Those who are accustomed to write know what it is to sit down and “reel off” sheet after sheet of matter without plan or premeditation, clear, coherent, ready for press, hardly needing revision. We are told of a lawyer who wrote in his sleep a lucid opinion throwing light on a most difficult case; of a mathematician who worked out in his sleep a computation which baffled him when awake. We know that Coleridge dreamed “Kubla Khan” in an after-dinner nap, line by line, and wrote it down when he awoke. What do these cases and a thousand like them point to? To no less than this: that, though the all important ego must, no doubt, “assist” at the thinking of the initial thought on a given subject, yet, after that first thought or two, ‘brain’ and ‘mind’ manage the matter between them, and the thoughts, so to speak, think themselves; not after the fashion of a pendulum which moves to and fro, to and fro, in the same interval of space, but in that of a carriage rolling along the same road, but into ever new developments of the landscape. An amazing thought—but have we not abundant internal evidence of the fact? We all know that there are times when we cannot get rid of the thoughts that will think themselves within us, though they drive away sleep and peace and joy. In the face of this law, benign as it eases us of the labour of original thought and decision about the everyday affairs of life, terrible when it gets beyond our power of control and diversion, what hope for those in whose debauched brain vile thoughts, involuntary, automatic, are for ever running with frightful rapidity in the one well-worn track? Truly, the in-look is appalling. What hope for these? And what of a scheme whose first condition is the regeneration of the vicious—vicious, not only by inherited propensity, and by unbroken inveterate habit, but reduced to that state of, shall we say, inevitable viciousness—when “unconscious cerebration,” with untiring activity, goes to the emanation of vicious imaginations? All these things are against us.

THE LAW FOR US—LIMITATIONS TO THE DOCTRINE OF HEREDITY.

But the last word of Science, and she has more and better words in store, is full of hope. The fathers have eaten sour grapes, but it is not inevitable that the children’s teeth be set on edge. The soul that sinneth it shall die, said the prophet of old, and Science is hurrying up with her, “Even so.” The necessary corollary to the latest modification of the theory of evolution is—acquired modifications of structure are not transmitted. All hail to the good news; to realise it, is like waking up from a hideous nightmare. This is, definitely, our gain; the man who by the continuous thinking of criminal thoughts has modified the structure of his brain so as to adapt it to the current of such thoughts, does not necessarily pass on this modification to his child. There is no necessary adaptation in the cerebrum of the new-born child to make place for evil thoughts. In a word, the child of the vicious may be born as fit and able for good living as the child of the righteous. Inherent modifications are, it is true, transmitted, and the line between inherent and acquired modifications may not be easy to define. But, anyway, there is hope to go on with. The child of the wicked may have as good a start in life, so far as his birthright goes, as the child of the just. The child’s future depends not upon his lineage so much as upon his bringing up, for education is stronger than nature, and no human being need be given over to despair. We need not abate our hope of the regeneration of the vicious for the bugbear of an inheritance of irresistible propensity to evil.

THE LAW FOR US—“ONE CUSTOM OVERCOMETH ANOTHER.”

But habit! It is bad enough to know that use is second nature, and that man is a bundle of habits; but how much more hopeless to look into the rationale of habit, and perceive that the enormous strength of the habit that binds us connotes a structural modification, a shaping of the brain tissues to the thought of which the habit is the outward and visible sign and expression. Once such growth has taken place, is not the thing done, so that it can’t be undone—has not the man taken shape for life when his ways of thinking are registered in the substance of his brain?

Not so; because one habit has been formed and registered in the brain is no reason at all why another and contrary habit should not be formed and registered in its turn. To-day is the day of salvation, physically speaking, because a habit is a thing of now; it may be begun in a moment, formed in a month, confirmed in three months, become the character, the very man, in a year. There is growth to the new thoughts in a new tract of the brain, and “One custom overcometh another.” Here is the natural preparation for salvation. The words are very old, the words of Thomas à Kempis, but the perception that they have a literal physical meaning has been reserved for us to-day. Only one train of ideas can be active at one time; the old cell connections are broken, and benign nature is busy building up the waste places, even be they the waste places of many generations. NO ROAD is set up in the track where the unholy thoughts carried on their busy traffic. New tissue is formed; the wound is healed, and, save, perhaps, for a scar, some little tenderness, that place is whole and sound as the rest.

This is how one custom overcometh another: there is no conflict, no contention, no persuasion. Secure for the new idea a weighty introduction, and it will accomplish all the rest for itself. It will feed and grow; it will increase and multiply; it will run its course of its own accord; will issue in that current of automatic unconscious involuntary thought of the man which shapes his character. Behold, a new man! Ye must be born again, we are told; and we say, with a sense of superior knowledge of the laws of nature, How can a man be born again? Can he enter the second time into his mother’s womb and be born? This would be a miracle, and we have satisfied ourselves that “miracles do not happen.” And now, at last, the miracle of conversion is made plain to our dull understanding. We perceive that conversion, however sudden, is no miracle at all—using the word miracle to describe that which takes place in opposition to natural law. On the contrary, we find that every man carries in his physical substance the gospel of perpetual, or of always possible, renovation; and we find how, from the beginning, Nature was prepared with her response to the demand of Grace. Is conversion possible? we ask; and the answer is, that it is, so to speak, a function for which there is latent provision in our physical constitution, to be called forth by the touch of a potent idea. Truly, His commandment is exceeding broad, and grows broader day by day with each new revelation of Science.

A man may, most men do, undergo this process of renovation many times in their lives; whenever an idea strong enough to divert his thoughts (as we most correctly say) from all that went before is introduced, the man becomes a new creature; when he is “in love,” for example; when the fascinations of art or of nature take hold of him; an access of responsibility may bring about a sudden and complete conversion:—

The breath no sooner left his father’s body

But that his wildness, mortified in him,