to believe / to trust / to believe in (God, etc.)

absolutely, categorically, certainly, definitely, surely / inevitably, invariably, without fail, necessarily, always

success / success in life, achievement in the world

succeed / be successful in life

(polite) do you believe in God?

unsuccessful

failure

completion bonus, fee paid upon success of a project, contingent fee

(idiomatic) achieve success

failure is a stepping stone to success