“Success shuns the man who lacks ideas.”

“He was a self-made man who owed his lack of success to nobody.”

“Associated with gratitude is virtue. I think they are related because he who is disposed to shun virtue lacks appreciation of life, its purposes, and the happiness and well-being of others.”

“He Who Knows And Knows That He Knows Is A Wise Man - Follow Him;He Who Knows Not And Knows Not That He Knows Not Is A Fool - Shun Him”

“The difference between a successful person and others is not a lack of strength, not a lack of knowledge, but rather a lack in will.”

“I have always believed that scientific research is another domain where a form of optimism is essential to success: I have yet to meet a successful scientist who lacks the ability to exaggerate the importance of what he or she is doing, and I believe that someone who lacks a delusional sense of significance will wilt in the face of repeated experiences of multiple small failures and rare successes, the fate of most researchers.”