We must believe on Him, that means trust Him for our salvation. We cannot place our trust in any measure on anything we do. Christ will not change anyone who will not let go of their own pride, it is pride that makes us think we can get or keep our salvation by being "good enough."
Ephesians 2:8-9 "8 For it is by grace you have been saved through faith, and this not from yourselves; it is the gift of God, 9 not by works, so that no one can boast.…"