Imagine someone else's heart is in your chest. They still have the power to beat the heart, so you are totally dependent on them to keep you alive. At the same time, you still have natural abilities. The decision of what you will wear today or which route you will take to work...it's up to you. So, you bear some responsibilty, but you are totally dependent on this other person's heart for your life. It's like their heart is fueling their life and your life at the same time.
Listen to what Paul says in Roman 6:11, "So you must also consider yourselves dead to sin and alive to God in Jesus Christ." The part I want you to think about is that phrase, "in Jesus Christ." The reason we are alive to God is because we are in Jesus Christ. The life with God comes from being totally dependent upon Christ.
But listen to Romans 6:13, "Do not present your members to sin as instruments for unrighteousness, but present yourselves to God as those who have been brought from death to life, and your members to God as instruments for righteousness." When we are in Christ, we are called to do everything in our power to live for righteousness.
Christ follower, you are called to fight hard today for righteousness. But you are also called to remember that you are only able to accomplish this because you are in Christ. Let us work hard today to bring glory to the one that is responsible for the beating of our heart.