Persistence is nothing more than Concentrated Effort mixed with Determination and Faith.
If you have no major purpose, you are drifting toward certain failure.
You have absolute control over just one thing, your thoughts. This divine gift is the sole means by which you may control your destiny. If you fail to control your mind, you will control nothing else.
Wisdom consists in knowing what not to want as well as what to want.
Action is the real measure of intelligence.
Wise men, when in doubt whether to speak or to keep quiet, give themselves the benefit of the doubt, and remain silent.