"I can see nothing," said I, handing it back to my friend. "On the contrary, Watson, you can see everything. You fail, however, to reason from what you see. You are too timid in drawing your inferences."
What is tolerance? It is the consequence of humanity. We are all formed of frailty and error; let us pardon reciprocally each other's folly - that is the first law of nature.
The boy who is going to make a great man must not make up his mind merely to overcome a thousand obstacles, but to win in spite of a thousand repulses and defeats.
Of all the causes which conspire to blind Man's erring judgement, and misguide the mind, What the weak head with strongest bias rules, Is PRIDE, the never-failing vice of fools.
Man gives every reason for his conduct save one, every excuse for his crimes save one, every plea for his safety save one; and that one is his cowardice
Failure is enriching. It's also important to accept that you'll make mistakes - it's how you build your expertise. The trick is to learn a positive lesson from all of life's negative moments.