Being in reality what it appears to be; having a character which corresponds with the appearance; not falsely assumed; genuine; true; real; as, a sincere desire for knowledge; a sincere contempt for meanness.
Honest; free from hypocrisy or dissimulation; as, a sincere friend; a sincere person.
Nothing in all the world is more dangerous than sincere ignorance and conscientious stupidity. Martin Luther King, Jr.
Ever since I was a child I have had this instinctive urge for expansion and growth. To me, the function and duty of a quality human being is the sincere and honest development of one's potential. Bruce Lee
Any emotion, if it is sincere, is involuntary. Mark Twain
I do all the evil I can before I learn to shun it? Is it not enough to know the evil to shun it? If not, we should be sincere enough to admit that we love evil too well to give it up. Mahatma Gandhi