If you would attain to what you are not yet, you must always be displeased by what you are. For where you are pleased with yourself there you have remained. Keep adding, keep walking, keep advancing. Augustine of Hippo
If we have been pleased with life, we should not be displeased with death, since it comes from the hand of the same master. Michelangelo
Even if you seek to harm an enemy, You should remove your own defects and cultivate good qualities. Through that you will help yourself, And the enemy will be displeased. Nagarjuna