"Anyone who conducts an argument by appealing authority is not using his intelligence, he is just using his memory"
- Leonardo da Vinci
"Knowledge has three degrees: opinion, science, illumination. The means or instrument of the first is sense; of the second, dialectic; of the third, intuition"
- Plotinus
"We know what we are, but know not why we may be"
- William Shakespeare
"Imagination is more important than knowledge. For while knowledge defines all we currently know and understand, imagination points to all we might yet discover and create"
- Albert Einstein
"You must not lose faith in humanity. Humanity is an ocean, if a few drops of the ocean are dirty, the ocean does not become dirty"
- Mohandas K. Ghandi
"The person who tries to live alone with no succeed as a human being. His heart withers if it does not answer another heart. His mind shrinks away if his hears only the echoes of his own thoughts and finds no other inspiration"
- Pearl S. Buck
"It is absurd to divide people into good and bad. People are either charming or tedious"
- Oscar Wilde
"Trust yourself. You know more than you think you do"
- Benjamin Spock
"No matter how deep a study you make. What you really have to rely on is your own intuition and when it comes down to it, you really don't know what's going to happen until you do it"
- Konosuke Matsushita
"It is not the critics who counts, not the man who points out how the strong man stumbled, or where the doer of deeds could have done better. The credit belongs to the man who is actually in the arena, whose face is marred by dust and sweat and blood, who strives valiantly, who errs and comes short again and again, who knows the great enthusiasms, the great devotions, and spends himself in a worthy cause, who at best knows achievement and who at worst if he fails at least fails while daring greatly so that his place shall never be with those cold and timid souls who know neither victory nor defeat"
- Theodore Roosevelt (From a speech given in Paris at the Sorbonne in 1910)
"And in the end, it's not the years in your life that count. It's the life in your years"
- Abraham Lincoln
"Only a life lived for others is a life worthwile"
- Albert Einstein
"Read no history, nothing but biography, for that is life without theory"
- Benjamin Disraeli
"The good life is inspired by love and guided by knowledge"
- Bertrand Russell
"Life is like an onion, you peel it off one layer at a time, and sometimes you weep"
- Carl Sandburg
"People grow through experience if they meet life honestly and courageously. This is how character is built"
- Eleanor Roosevelt
"Life resembles a novel more often then novel resemble life"
- George Sand
"Life is not spectacles or a feast, it is a predicament"
- George Santayana
"How far you go in life depends on you being tender with the young, compassionate with the aged, sympathetic with the striving and tolerant of the weak and the strong. Because someday in life you will have been all of these"
- George Washington Carver
"When one door closes another door opens, but we so often look so long and so regretfully upon the closed door, that we do not see the ones which open for us"
- Alexander Graham Bell
"Hope is like a road in a country, there was never a road, but when many people walk on it, the road come into existence"
- Lin Yutang