A person who never made a mistake never tried anything new.
If A equals success, then the formula is: A = X + Y + Z, X is work. Y is play. Z is keep your mouth shut
And the high destiny of the individual is to serve rather than to rule, or to impose himself in any other way.
But their intervention makes our acts to serve ever less merely the immediate claims of our instincts.
It is, in fact, nothing short of a miracle that the modern methods of instruction have not yet entirely strangled the holy curiosity of inquiry; for this delicate little plant, aside from stimulation, stands mainly in need of freedom; without this it goes to wrack & ruin without fail. It is a very grave mistake to think that the enjoyment of seeing & searching can be promoted by means of coercion & a sense of duty. To the contrary, I believe that it would be possible to rob even a healthy beast of prey of its voraciousness, if it were possible, with the aid of a whip, to force the beast to devour continuously, even when not hungry, especially if the food, handed out under such coercion, were to be selected accordingly.
Try not to become a man of success, but rather try to become a man of value.