It’s not about convincing God that you believe in him. It’s about surrendering your life to God because you trust in his love.
God is the one who is faithful. God is the one who first loved us. God is the one who shows us that he can be trusted. Our role in all this is to accept that love. We have it backwards when we think we have to earn God’s love. God’s love is unearned.
Faith is trust. Trust requires letting go. Trust also requires hanging on. Hanging on to the One who can be trusted.