What's done is done.

Hilliard MacBeth

Judge a tree from its fruit, not from its leaves.

Euripides

If you kick a stone in anger, you'll hurt your own foot.

Korean Proverb

Slow is every foot on an unknown path.

Irish proverb

He who waits to do a great deal of good at once, will never do anything.

Samuel Johnson

Remember that wherever your heart is, there you will find your treasure.

Paulo Coelho