Pittacus of Mytilene quotes:

Whatever you do, do it well.

Forgiveness is better than revenge.

Do not reproach a man with his misfortunes, fearing lest Nemesis may overtake you.

Cultivate truth, good faith, experience, cleverness, sociability, and industry.

Know the right moment.

Know thine opportunity.

Know thy opportunity.

Know your opportunity.

Measure a person by what they do with power.

Seize time by the forelock.

Speak no ill of a friend, nor even of an enemy.

Do not say before hand what you are going to do; for if you fail, you will be laughed at.

Do not to your neighbor what you would take ill from him.

Do well the duty that lies before you.

That state is best ordered when the wicked have no command, and the good have.

The best state is that in which bad men are not allowed to hold office, and good men are not allowed to refuse office.

What thou intendest to do, speak not of before thou doest it.

You should know which opportunities to choose.