True friendship can afford true knowledge. It does not depend on darkness and ignorance.
Henry David Thoreau
I love those who can smile in trouble, who can gather strength from distress, and grow brave by reflection. It is the business of little minds to shrink, but they whose heart is firm, and whose conscience approves their conduct, will pursue their principles unto death.
Leonardo da Vinci
The function of education is to teach one to think intensively and to think critically. Intelligence plus character - that is the goal of true education.
Martin Luther King, Jr.