One of his friends was Bernis—to be poet, Cardinal, and protégé of Madame de Pompadour—and the pair would dine together at six sous a head at a neighbouring restaurant.

The schooldays were all too short. The practical master-cutler at Langres soon intimated to Denis that it was time to choose a profession. But Denis declines to be a doctor, because he has no turn for murder; or a lawyer, because he has no taste for doing other people’s business. In brief, he does not want to be anything. He wants to learn, to study, to look round him. But a shrewd old tradesman is not going to give, even if he could afford to give, any son of his the money to do that. Denis had at home a younger brother, who was to be a priest (‘that cursed saint,’ the graceless Denis called him hereafter), a sister, good and sensible like her father, and a mother, who was tender and foolish over her truant boy, after the fashion of mothers all the world over. Here were three mouths to feed. Denis loved his father with all the impetuous affection of his temperament. He was delighted when, some years later, he went back to Langres and a fellow-townsman grasped him by the arm saying: ‘M. Diderot, you are a good man, but if you think you will ever be as good a man as your father, you are much mistaken.’ But Diderot had never the sort of affection that consists in doing one’s utmost for the object of the affection. He preferred to be a care and a trouble to his family and to live by his wits, harum-scarum, merry, and poor. He chose that life, and abided by the choice for ten years.

Three times in that period the old servant of the family tramped all the way from Langres to Paris with little stores of money hidden in her dress for this dear, naughty scapegrace of a Master Denis; but except for this, he lived on his wits in the most literal sense of the term. He made catalogues and translations; he wrote sermons and thought himself well paid at fifty écus the homily; he became a tutor—until the pupil’s stupidity bored him, when he threw up the situation and went hungry to bed. He once indeed so far commanded himself as to remain in this capacity for three months. Then he sought his employer; he could endure it no more. ‘I am making men of your children, perhaps; but they are fast making a child of me. I am only too well off and comfortable in your house, but I must leave it.’ And he left.

One Shrove Tuesday he fainted from hunger in his wretched lodgings, and was restored and fed by his landlady. He took a vow that day, and kept it, that, if he had anything to give, he would never refuse a man in need. By the next morning he was as light-hearted as usual again. A bright idea, even the recollection of a few apt lines from Horace, would always restore his cheerfulness. He enjoyed indeed all the blessings of a sanguine nature, and fell into all its faults. The facts that his father was paying his debts, that often he had to sponge on his friends for a dinner, or trick a tradesman for an advantage he could not buy, neither troubled him nor made him work. It is no doubt to his credit that he never stooped, as he might easily have done, to be the literary parasite of some great man, to prostitute his talents to praise and fawn on some ignoble patron. But though that gay, profligate existence has been often made to sound romantic on paper, it was squalid and shabby enough in reality, with that shabbiness which is of the soul.

In the year 1743, when Diderot was thirty years old, he must needs fall in love. He was lodging with a poor woman and her daughter who kept themselves by doing fine needlework. Anne Toinette Champion (Nanette, Diderot called her) was not only exquisitely fresh and pretty, but she was good, simple, and honest. To gain access to her Diderot stooped to one of the tricks to which his life had made him used. He pretended that he was going to enter a Jesuit seminary, and employed Nanette to make him the necessary outfit. His mouth of gold did the rest. No one, perhaps, who did not live with Diderot and hear him talk ‘as never man talked,’ who did not know him in the flesh and fall under the personal influence of his magnetic and all-compelling charm, will ever fully understand it. ‘Utterly unclean, scandalous, shameless’ as many honest and upright people knew him to be, he fascinated them all. Something indeed of that fascination still lingers about him, as the scent of a flower may cling to a coarse, stained parchment. Read the facts of his life, as briefly and coldly stated in some biographical dictionary, and most men will easily dismiss him as a great genius and a great scoundrel. Read the thousand anecdotes that have gathered about his name, of the love his contemporaries bore him, of his generosity, his glowing affections, his passionate pity for sorrow, and his hot zeal for humanity, and it is easy to understand not only the mighty part Diderot played in the great movement which prepared men for freedom and the French Revolution, but also his insistent claims on their love and forgiveness.

A little seamstress could not, in the nature of things, resist him long. The hopeful lover went to Langres to obtain his father’s consent to his marriage, which was of course refused. At the date of his wedding, November 6, 1743, Denis had published scarcely anything, had no certain sources of income, and very few uncertain ones. He was, moreover, at first so jealous of his dearest Nanette that he made her give up her trade of needlework, as it brought her too much into contact with the outer world. The pair lived on her mother’s savings; and then Denis translated a history of Greece from the English, and kept the wolf from the door a little longer.

Poverty fell, as ever, more hardly on the wife than on the husband. The ever popular Diderot was often asked out to dine with his friends, and always went; while at home Nanette feasted on dry bread, to be sure that this fine lover of hers should be able to have his cup of coffee and his game of chess at the café of the Regency as usual. Of course Denis took advantage of her talent for self-sacrifice. His writings contain much sentimental pity, expressed in the most beautiful language, for the condition and the physical disadvantages of women; and he spoke of himself most comfortably as a good husband and father, and honestly believed that he was both. But he began to neglect his wife directly his first passion for her was spent. She was not perfect, it is true. Of a certain rigidity in her goodness, and a certain bourgeois narrowness in her view of life, she may be justly accused. But it remains undeniable that she was thrifty and unselfish at home, while her husband was profligate and self-indulgent abroad, that she saved and worked for her children, while he wrote fine pages on paternal devotion, and that he never gave her the consideration and forbearance he demanded from her as a matter of course. Before her first child was born the poor girl had lost her mother, and had no one in all the world to depend on but that most untrustworthy creature on earth, a genius of bad character.

In the year 1745 Denis sent her to Langres for a long visit to his parents, to effect if possible a reconciliation with them.

The man who called himself ‘the apologist of strong passions,’ who thought marriage ‘a senseless vow,’ and ‘was always very near to the position that there is no such thing as an absolute rule of right and wrong,’ would not be likely to be faithful. He was not faithful. There soon loomed on the scene a Madame Puisieux (the wife of a barrister), aged about five-and-twenty, charming, accomplished, dissolute. Diderot plunged headlong into love with her, as he plunged headlong into everything. To be sure, she was abominably extravagant and always wanting money. To gratify her demands Diderot wrote, most characteristically, an ‘Essay on Merit and Virtue,’ and brought Merit and Virtue the sum he received in payment. But Madame’s love of fine clothes was insatiable. Between a Good Friday and Easter Day her lover composed for her the ‘Philosophical Thoughts,’ which first made him famous, which were paid the compliment of burning, and for which his mistress received fifty louis.

The history of the inspiration of masterpieces would afford a peculiarly interesting insight into human nature. It may be set down to the credit of Madame Puisieux (history knows of nothing else to her credit) that her rapacity at least forced this incorrigible ne’er-do-weel upon his destiny, and first turned Diderot, the most delightful scamp in the capital, into Diderot the hard-working philosopher and man of genius.