All's fair in love and war.

Gravitation cannot be held responsible for people falling in love. (A. Einstein)

A drowning man will clutch at a straw.

Let sleeping dogs lie.

The appetite grows with what it feeds on.

A bird in the hand is worth two in the bush.

Don't make a mountain out of a molehill.

Practice makes perfect.

He who excuses himself, accuses himself.

Make hay while the sun shines.

Haste makes waste.

Fortune is fickle.

Duty is what we expect from others.

Curiosity killed the cat.

All's well that ends well.

Honesty is the best policy.

All that glitters is not gold.

Forbidden fruit is sweetest.

Among the blind one - eyed man is a king.

All that lives must die, passing through nature to eternity. (W. Shakespeare)