"You do not become good by trying to be good, but by finding the goodness that is already within you." 

-Eckhart Tolle

"Aim above morality. Be not simply good, be good for something." 

-Henry David Thoreau

"All that is necessary for the triumph of evil is that good men do nothing." 
-Edmund Burke

“It is not good for all our wishes to be filled; through sickness we recognize the value of health; through evil, the value of good; through hunger, the value of food; through exertion, the value of rest.” 

-Greek Proverb

“The roots of all goodness lie in the soil of appreciation for goodness.” 
-Dalai Lama XIV

“If you want to realize the truth, don’t be for or against. The struggle between good and evil is the primal disease of the mind.”
-Seng Ts’an

"Because since the beginningless past we are running after objects, not knowing where our Self is, we lose track of the Original Mind and are tormented all the time by the threatening objective world, regarding it as good or bad, true or false, agreeable or disagreeable. We are thus slaves of things and circumstances." 

-Daisetz Teitaro Suzuki

"Look within. Within is the fountain of good, and it will ever bubble up, if thou wilt ever dig."
-Marcus Aurelius Antoninus Augustus

"Good judgment comes from experience, and a lot of that comes from bad judgment." 
-William Penn Adair Rogers

“Virtue is persecuted more by the wicked than it is loved by the good." 
-Buddha

"Truthful words are not beautiful; beautiful words are not truthful. Good words are not persuasive; persuasive words are not good."

-Lao Tzu