External doubts are relatively easy to deal with. Most of the time, criticism is helpful, and when it isn’t, we ignore it.
Internal doubt, on the other hand, is a different animal. It’s really hard to ignore yourself.
So, your best bet is to embrace your doubts.
Doubt is good.
Doubt means you’re thinking.
Smart people are full of doubt, because they realize how little they actually know. They spend a lot of time exploring their doubts. They beat up ideas and processes and products and services until very little doubt remains. Then they doubt some more.
If you aren’t doubting, you’re probably not creating much value.
Those who do, doubt.