A penny well spent is worth more than a penny saved.
A smile is a true life force, the only one capable of moving the immovable.
Success is not achieved by celebrating victories but by overcoming failures.
A pebble in the bed of a humble brook can change the course of a river.
True science is far above political passions, racial and language differences, and religious sectarianism.
Luck is nothing more than the ability to take advantage of favorable opportunities.