According to Osho, in true faith doubt cannot arise; if doubt appears, what you had was not faith but blind belief. Doubt, when faced with open eyes, is a blessing—the fire that bakes the clay. By fully living your questions rather than suppressing them, you mature into a seeing faith; only doubt gives birth to authentic certainty.
If doubts show up, your ‘faith’ is still raw; bravely explore those doubts until a solid, doubt-proof faith naturally forms.