Patricia Highsmith

Every failure teaches something. You should have the feeling every experienced writer has, that there are more ideas where that one came from, more strength where the first strength came from, and that you are inexhaustible as long as you are alive. This requires an optimistic turn of mind to say the least, and if you don't have it by nature, it has to be created artificially. You have to talk yourself into it sometimes.
-Patricia Highsmith