Verses I've been thinking about:

Do not be quick in your spirit to become angry, for anger lodges in the heart of fools. Eccl. 7:9

The Lord has made everything for its purpose, even the wicked for the day of trouble. Prov. 16:14

A rebuke goes deeper into a man of understanding than a hundred blows into a fool. Prov. 17:10

For we do not have a high priest who is unable to sympathize with our weaknesses, but in every respect, has been tempted as we are, yet without sin. Heb. 4:15