623  Our greatest weakness lies in giving up. The most certain way to succeed is always to try just one more time.
557  The greatest way to live with honor in this world is to be what we pretend to be.
605  Your most unhappy customers are your greatest source of learning
587  The least of things with a meaning is worth more in life than the greatest of things without it.
556  Death may be the greatest of all human blessings.