And here is the devotional I wrote for it, if you are interested:
“If you declare with your mouth, “Jesus is Lord,” and believe in your heart that God raised him from the dead, you will be saved. For it is with your heart that you believe and are justified, and it is with your mouth that you profess your faith and are saved.” Romans 10:9-10 NIV
I think it is easy for us to read this verse and say, ok, here is the check list: 1) tell someone that Jesus is Lord, 2) believe in my heart that God raised Him from the dead. Boom, done, hello heavenly dwelling. Right?
But there is so much more to this than Paul lets on. Simply saying “Jesus is Lord,” is easy, anyone can do that, and anyone can choose not to mean that when they say it, or they may not fully understand what it means to follow up those words with action (See James 2). Likewise, what does it mean to “believe in your heart that God raised [Jesus] from the dead”?
I think it is more than simply accepting that Jesus died for you and washed your sins away, so that now you are holy in God’s sight. Jesus’ resurrection was (one of?) the last miracle(s) He did while He was physically on this earth. If you truly believe in the resurrection of Christ, then what does that say about all the miracles He did before that one? Do you believe in those too? And if you believe in all of the previous miracles He did (after all, if He could come back from the grave, what is turning water into wine or feeding thousands of people with a couple loaves of bread?), then do you believe the things He said as well? And if you believe the things He said, do you follow His advice? CS Lewis once said, “There would be no sense in saying you trusted Jesus if you did not take His advice.”
So I ask you, what is Jesus advising you to do? Has He advised you to do something recently that you have not done? Good news, He is patient and merciful, and He allows second tries. If you faltered previously, spend some time with God and ask for another chance. Ask that He would change your heart so that you would desire to follow His advice, and listen for His voice.