Most strike me as having either an INFp or Delta flavor to them. A few off the top of my head:

Beauty is in the eye of the beholder.

Confidence is key.

Hard work always pays off

What goes around comes around

Perception is reality

Where there's a will, there's a way

What doesn’t kill me will only make me stronger

Everything happens for a reason

There’s no I in Team

Time heals all wounds

Good things come to those who wait