Jesus didn’t just purchase salvation for the elect on the cross. He also bought all of the benefits of the gospel kingdom, one of the greatest being obedience. Without obedience to the gospel, we would only have wrath waiting for us (2 Thess. 1:8).
And I will give you a new heart, and a new spirit I will put within you. And I will remove the heart of stone from your flesh and give you a heart of flesh. And I will put my Spirit within you, and cause you to walk in my statutes and be careful to obey my rules.
And being made perfect, [Jesus] became the source of eternal salvation to all who obey him.
Without God giving us a new heart of flesh, we would have no ability to obey him. Praise God that he has purchased obedience for us through Jesus’ death so we can experience eternal salvation with him forever.