"Always think what you fear to think, do what you fear to do, and be who you fear to be."- to what extent do you agree?

No, that sounds miserable and masochistic. But there are times in life when we want or need to do something, or it's the right thing to do, but it scares us. So at those times you man up and do it anyway, if you can. But fear is a lousy thing to experience, even if necessary. No need to go seek it out for its own sake.

No thanks. I dont fear to think anything. I am afraid to jump out of an airplane but id do it if the opportunity arose. I'm afraid of being a bad person like a criminal so I dont consider becoming one.

It's too vague, because best case it's a great way to empower yourself, live fearless, and successful, worst case however this is how Hitler got started.

If I become who I fear to be many will suffer