Adversity has the effect of eliciting talents which, in prosperous circumstances, would have lain dormant. – Horace (Quintus Horatius Flaccus), Satires
Some luck lies in not getting what you thought you wanted but getting what you have, which once you have got it you may be smart enough to see is what you would have wanted had you known. – Garrison Keillor
The marvelous richness of human experience would lose something of rewarding joy if there were no limitations to overcome. The hilltop hour would not be half so wonderful if there were no dark valleys to traverse. – Helen Keller