I think it's a very firm part of human nature that if you surround yourself with like-minded people, you'll end up thinking more extreme versions of what you thought before. ↗
Surround yourself with the best people you can find, delegate authority, and don't interfere as long as the policy you've decided upon is being carried out. ↗
Surround yourself with good people. Whether they're the best or not, people are capable of learning if they've got good hearts and they're good souls. ↗