Friedrich von Schiller (10 November 1759  – 9 May 1805),  a German poet, philosopher, historian, and playwright.

If you want to study yourself — look into the hearts of other people. If you want to study other people — look into your own heart.

Washington Irving (1783-1859)

Happiness is reflective, like the light of heaven; and every countenance, bright with smiles, and glowing with innocent enjoyment, is a mirror transmitting to others the ways of a supreme and ever-shining benevolence.

Samuel Johnson (1803-1882)

Your manuscript is both good and original, but the part that is good is not original and the part that is original is not good.

L. Frank Baum (1856-1919)

If we used money to buy things with, instead of love and kindness and the desire to please one another, then we should be no better than the rest of the world.

Confucius

“Learning without thinking is labor cost. Thinking without learning is perilous”

“Achievement of those with knowledge in a field is ussually inferior to those who like the subject of their study, while that of the latter is usually overtaken by those who take delight in their study”

“When I walk along with two others, they may serve me as my teachers”