“The first requisite for success is the ability to apply your physical and mental energies to one problem incessantly without growing weary.”

“Happiness is a measure of one's fill of not physical success, but of mental and spiritual success.”

“Success is the ability to go from failure to failure without losing your enthusiasm”

“It is only because of problems that we grow mentally and spiritually. ”

“At such a moment, it is not the physical pain which hurts the most (and this applies to adults as much as to punished children); it is the mental agony caused by the injustice, the unreasonableness of it all.”

“It is in the whole process of meeting and solving problems that life has meaning. Problems are the cutting edge that distinguishes between success and failure. Problems call forth our courage and our wisdom; indeed, they create our courage and our wisdom. It is only because of problems that we grow mentally and spiritually. It is through the pain of confronting and resolving problems that we learn.”