Thomas Aquinas
Catholic philosopher and theologian
Sayings by Thomas Aquinas
Beware the man of a single book.
Good can exist without evil, whereas evil cannot exist without good.
All that I have written seems like straw to me.
Women are by nature 'deficient and misbegotten.'
Strictly speaking, woman is a monster of nature.
In procreation the man is active, the woman is passive.
For a woman is an imperfect man.
Heretics can not only be excommunicated, but also justly killed.
The root of all evil is avarice.
Man is by nature a social animal.
The greatest evil is to do wrong and not to suffer for it.
The state has the right to coerce its citizens for the common good.
It is not lawful for a man to have more than one wife at a time.
The natural order of things requires that women be subject to men.
Slavery is a consequence of sin, and thus it is just.
The purpose of marriage is the procreation of children.
Usury is a sin against justice.
It is not lawful to lie in order to save anyone from death.
The primary cause of sin is the will.
Ignorance is the cause of all evil.