Integrity

"Integrity is telling myself the truth. And honesty is telling the truth to other people."
— Spencer Johnson

"It is not who is right but what is right that is of importance."— Thomas Huxley  

"The first step in the evolution of ethics is a sense of solidarity with other human beings."–Albert Schweitzer 

"Different things delight different people. But it is my delight to keep the ruling faculty sound without turning away either from any man or from any of the things which happen to men, but looking at and receiving all with welcome eyes and using everything according to its value."
— Marcus Aurelius 

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

"Virtue depends partly upon training and partly upon practice; you must learn first, and then strengthen your learning by action."
— Lucius Annaeus Seneca