Our ancestors have invented, we can at least innovate.

If everyday you keep getting better, you end up being the best.

It is right to be satisfied with what you have, never with what you are.

A challenge to improve yourself is the greatest of all challenges you will ever face.

Occasional criticism is better than the constant admiration.

Accept both criticism and compliments because a rainbow needs both sun and rain to reveal itself.

Don't overestimate yourself because of compliments and don't underestimate yourself because of criticism.

Don't let appreciation get to your head and don't let objections get to your heart.

Be courteous to see your mistakes, courageous to accept them, and clever enough to correct them.