Then I will make you a wall to this people, a fortified wall of bronze; they will fight against you but will not overcome you, for I am with you to save and deliver you, declares the LORD. — Jeremiah 15:20

How did you receive Christ? By grace through faith, not by works. Paul says walk in Him the same way you received Him. You didn't earn your way into the kingdom, and you don't maintain your standing by performance. It's grace all the way down — from start to finish. The same faith that first trusted Christ is the faith that walks with Him day by day.