Reason and love are sworn enemies.

Passion against Reason, Reason against Faith, Faith against the Devil, and my Conscience against all.

From whatever side the matter is regarded, it is always found that reason confronts our longing for personal immortality and contradicts it. And the truth is, in all strictness, that reason is the enemy of life.

The truth is that reason is the enemy of life.

Reason is the greatest enemy that faith has: it never comes to the aid of spiritual things, but--more frequently than not--struggles against the divine Word, treating with contempt all that emanates from God.

Reason is no match for passion.

Le dijo que el amor era un sentimiento contra natura, que condenaba a dos desconocidos a una dependencia mezquina e insalubre, tanto más efímera cuanto más intensa.

Love is the opposite of good sense.

Son, you're probably too young to look for wisdom in anyone's words but your own, but I'll tell you this: love is the enemy... Yes. The poets continually and sometimes willfully mistake love. Love is the old slaughterer. Love is not blind. Love is a cannibal with extremely acute vision. Love is insectile; it is always hungry.
When asked what love eats:
Friendship. It eats friendship.

In love there are two evils: war and peace.

Anger and intolerance are the twin enemies of correct understanding.

It is impossible to love and be wise.

But reason does not govern love.

You can't be wise and in love at the same time.