Perhaps the image you have of the devil is a cartoon of a man in a red suit with horns a pointy tale and a pitch fork, Satan would love for you to think of him as a harmless cartoon character, but don't be fooled... Satan is anything but harmless.
Many biblical passages teach that we're not saved by our own efforts but by the grace of God alone. But the same passages also tell us good works are an essential evidence of the salvation experience. We're not saved by good works, but for good works. It begins with God's grace, and it's sustained by his grace as you shape your character by what you do as you cross the bridge.
It's true the Holy Spirit alone can reproduce the character of our Lord Jesus, and we must always abide in Christ. But the Bible also makes us active partners in the process, and we must be diligent to do our part. "Be diligent to present yourself approved to God, a worker who does not need to be ashamed".
Throughout our lives, we develop our character consciously or unconsciously. In your journey to a life beyond amazing, you'll learn to develop your character in ways that bring remarkable rewards.