According to Osho, forcing belief in God while your mind is skeptical is dishonest and premature. Become a total skeptic: doubt so completely that you even doubt doubt itself. At that peak, doubt cancels doubt and a fresh, virgin faith arises. Half-doubt only paralyzes action and meditation. Even 'I know only matter' is unexamined—perception itself is uncertain.
Don't fake belief; keep doubting until doubt burns out, and real trust will arise on its own.