Read his "Praise of Folly," which has been translated into English and can be had through any book-dealer.
When you read it, remember that Erasmus was never answered, save by abuse and threats.
In his letters to the Prothonotary of the Pope, letters written for the Pope to read, and which the Pope did read, Erasmus arraigns the unmarried clergy of Rome, her monks and her nuns, her monasteries and her convents, in the same terms that are used by the Preamble to the Act of the British Parliament which stated that reasons for the dissolution of these Romish hell-holes.
The accusations fathered by Erasmus and laid before the Pope, agree in every essential particular with the revelations of Blanco White, of S. J. Mahoney, William Hogan, Joseph McCabe, Bishop Manuel Ferrando, Margaret Shepherd, Maria Monk, and every other witness who has had the courage to uncover these papal dens of infamy, torture, vice and crime.
I have not the space to quote at any length from the Letters of Erasmus: get the book and read it for yourself.
But weigh this passage—
"Men are threatened or tempted into vows of celibacy. They can have license to go with harlots, but they must not marry wives.
They may keep concubines and remain priests. If they take wives, they are thrown to the flames.
Parents who design their children for a celibate priesthood should emasculate them in their infancy, instead of forcing them, reluctant or ignorant, into a furnace of licentiousness."
What was this furnace of licentiousness? The cloistered convent, or the monastery.