Mike Tyson

Listen, when you're in that ring called life, everyone's gonna tell you what you can't do. But I'm telling you right now, your greatest opponent isn't standing in front of you - it's that voice inside your head. Destroy that doubt, and you're unstoppable.

Don't ever forget this. While you are busy doubting yourself, doubting what you can do, doubting your dreams, doubting your capabilities, someone else is admiring your strength. They are admiring the things that you are doing, and they are admiring you.