"Success is not measured by what you accomplish, but by the opposition you have encountered, and the courage with which you have maintained the struggle against overwhelming odds."

"To many a man, and sometimes to a youth, there comes the opportunity to choose between honorable competence and tainted wealth. The young man who starts out to be poor and honorable, holds in his hand one of the strongest elements of success."

"If you do not feel yourself growing in your work and your life broadening and deepening, if your task is not a perpetual tonic to you, you have not found your place."

"We must give more in order to get more. It is the generous giving of ourselves that produces the generous harvest."

"Nature teaches us a valuable lesson: the true master is an eternal student."

"It is absolutely impossible to transcend the laws of nature. What can change in historically different circumstances is only the form in which these laws expose themselves."

"There are three principal means of acquiring knowledge... observation of nature, reflection, and experimentation. Observation collects facts reflection combines them experimentation verifies the result of that combination."

"Controversy is part of the nature of art and creativity."