Discontent is the first necessity of progress. Show me a thoroughly satisfied man and I will show you a failure.
Just because something doesn't do what you planned it to do doesn't mean it's useless.
Maturity is often more absurd than youth and very frequently is most unjust
What you are will show in what you do.
Results! Why, man, I have gotten a lot of results. I know several thousand things that won't work.
Everything comes to him who hustles while he waits.
You will have many opportunities in life to keep your mouth shut: You should take advantage of every one of them.
There ain't no rules around here, we're trying to accomplish something.