Knowledge is love and light and vision. — Helen Keller

In friendship as well as love, ignorance very often contributes more to our happiness than knowledge. — Francois de La Rochefoucauld
Only on paper has humanity yet achieved glory, beauty, truth, knowledge, virtue, and abiding love. — George Bernard Shaw
The man of knowledge must be able not only to love his enemies but also to hate his friends. — Friedrich Nietzsche
Optimism is the faith that leads to achievement. Nothing can be done without hope and confidence. — Helen Keller
So long as the memory of certain beloved friends lives in my heart, I shall say that life is good. — Helen Keller
No matter how dull, or how mean, or how wise a man is, he feels that happiness is his indisputable right. — Helen Keller