One who thinks for himself is a threat to his enemies, a refuge to his acquaintances, a prize to his friends, and a gift to the world.

Learn from acquaintances, and you are clever;
from friends, and you are intelligent; from enemies, and you are shrewd; but learn from all, and you are wise.

Imprudent people accumulate adversaries, intelligent people accumulate acquaintances, and enlightened people accumulate friends.

A shrewd enemy will benefit you more than a foolish friend.

Seeds are proof that God puts within you what is supposed to enrich the world around you.

Love your friends with your eyes closed, but love your enemies with both eyes open.