He who has once made himself notorious as utterly unprincipled, is not credited even when he speaks the truth.
He who trusts himself for safety to the care of a wicked man, in seeking succor meets with ruin.
Nothing is impossible to industry (fortitude).
Practice is everything. This is often misquoted as Practice makes perfect.
The saying, "Practice is everything," is Periander's.
Judge of a tree by its fruit, not by its leaves.