Worry a little bit every day and in a lifetime you will lose a couple of years. If something is wrong, fix it if you can. But train yourself not to worry: Worry never fixes anything.
No catalogue of horrors ever kept men from war. Before the war you always think that it's not you that dies. But you will die, brother, if you go to it long enough.
Intelligence is so damn rare and the people who have it often have such a bad time with it that they get bitter or propagandistic and then it's not much use.
The best way is always to stop when you are going good and when you know what will happen next. If you do that every day ... you will never be stuck. Always stop while you are going good and don't think about it or worry about it until you start to write the next day. That way your subconscious will work on it all the time. But if you think about it consciously or worry about it you will kill it and your brain will be tired before you start.
Most people are heartless about turtles because a turtle's heart will beat for hours after he has been cut up and butchered. But the old man thought, I have such a heart too and my feet and hands are like theirs.