When people try to pull you down, remember, they had to look up to do so.
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.
In my youth I had three teachers: friends, enemies, and books. In my adulthood I had three professors: God, nature, and life.
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.
Ignorance is your opponent, fear is your enemy, vice is your adversary, virtue is your friend, and wisdom is your helper.
Don't downgrade your dreams to upgrade your relationships.
A shrewd enemy will teach you more than a foolish friend.
Love your friends with your eyes closed, but love your enemies with both eyes open.
Be like seeds; do not see dirt thrown at you as your enemy, but as ground to grow.
A rose does not answer its enemies with words, but with beauty.
The greater the fruit a trees bears, the greater the number of stones thrown at it.