"What then is time? If no one asks me, I know what it is. If I wish to explain it to him who asks, I do not know."

"Having children is the only worthy fruit of sexual intercourse."

"He who is not jealous is not in love."

"God had one son on earth without sin, but never one without suffering."

"The sexual act itself, if not for the purpose of procreation, is a venial fault."