False happiness renders men stern and proud, and that happiness is never communicated. True happiness renders them kind and sensible, and that happiness is always shared.

Montesquieu
Profession: Philosopher
Nationality: French

Some suggestions for you :
Man, as a physical being, is like other bodies governed by invariable laws.
To become truly great, one has to stand with people, not above them.
Success in the majority of circumstances depends on knowing how long it takes to succeed.
It is always the adventurers who do great things, not the sovereigns of great empires.
A nation may lose its liberties in a day and not miss them in a century.
Talent is a gift which God has given us secretly, and which we reveal without perceiving it.
To love to read is to exchange hours of ennui for hours of delight.