His failures are as valuable as his successes: by misjudging one thing he conforms something else, even if at the time he does not know what that something else is. ↗
The most essential factor is persistence - the determination never to allow your energy or enthusiasm to be dampened by the discouragement that must inevitably come. ↗
Perhaps one of the only positive pieces of advice that I was ever given was that supplied by an old courtier who observed: Only two rules really count. Never miss an opportunity to relieve yourself; never miss a chance to sit down and rest your feet. ↗