The true sign of intelligence is not knowledge but imagination.”

Albert Einstein, German-born theoretical physicist

If you have always done it that way, it is probably wrong.”

Charles Kettering, American inventor

By leadership we mean the art of getting someone else to do something that you want done because he wants to do it.”

Dwight Eisenhower, American president

Spoon feeding in the long run teaches us nothing but the shape of the spoon.”

Edward Forster, British writer

Men stumble over pebbles, never over mountains.”

H. Emilie Cady, American author

No effort that we make to attain something beautiful is ever lost.”

Helen Keller, American author and activist

Nothing is really work unless you would rather be doing something else.”

James Barrie, Scottish dramatist

A ship in harbor is safe, but that is not what ships are built for.”

John Shedd, American writter

A good objective of leadership is to help those who are doing poorly to do well and to help those who are doing well to do even better.”

Jim Rohn, American entrepreneur

Don’t be afraid to give up the good to go for the great.”

John D. Rockefeller, American industrialist

We choose our joys and sorrows long before we experience them.”

Khalil Gibran, Lebanese-American artist, poet and writer

How much time he saves who does not look to see what his neighbor says or does or thinks.”

Marcus Aurelius, Roman emperor

Our opinion of people depends less upon what we see in them than upon what they make us see in ourselves.”

Sarah Grand,¬†British writer and women’s rights activist

There is no greater impediment to the advancement of knowledge than the ambiguity of words.”

Thomas Reid, Scottish philosopher

Judge a man by his questions rather than by his answers.”

Voltaire, French writer and historian