The offspring of doubt is motionlessness.
And by that I don’t mean peaceful stillness, but anxious paralysis watching progress being stifled.
Doubt’s parents are perfection and certainty.
The future hasn’t happened, so all we can hope to see looking forward is potential. Potential can’t be certain by definition.
Stepping out to build or bring some potential good you “see by faith” is scary. There’s no perfect plan or guarantee. In fact, your methodology (and character) will likely have to adjust and expand in the process.
But moving step-by-step in an imperfect, human way toward uncertain potential is so much better than seeing yourself stuck feverishly scrounging to align every detail before you can start.