Doubt & Closeness
Doubt cannot come where there is a sense of closeness. Doubt needs a distance to appear. You never doubt something that is dear to you, close to you.
The moment you doubt, it is no longer dear to you; a distance has come.
You may doubt yourself, but you do not doubt that which is yours.
Self-doubt is a lack of closeness to oneself, a sense of belongingness, closeness, intimacy are all the antidotes for doubt.