And the LORD said to Moses and Aaron, “This is the statute of the Passover: No foreigner is to eat of it. — Exodus 12:43

What a relief — your salvation doesn't depend on your ability to hold on, but on God's commitment to finish what He started. The Lord will perfect that which concerns you. He who began a good work will carry it to completion. Your grip may falter, but His never does. He keeps you by His power, and nothing can snatch you from His hand.