I don't think you can ever do your best. Doing your best is a process of trying to do your best.
Mathematics is the language in which the gods talk to people.
The only way to get the best of an argument is to avoid it.
Every mathematical problem has a solution; sometimes it just takes time to find it.
I love argument, I love debate. I don't expect anyone just to sit there and agree with me, that's not their job.