Therefore, since Christ suffered in his body, arm yourselves also with the same attitude, because he who has suffered in his body is done with sin. 1 Peter 4:1
A cultural Christian with a half-hearted commitment to Christ is not going to run up against much spiritual resistance. And even when they do, like the Israelites before Goliath, they turn tail and run. But if you are serious about following hard after Jesus, get ready for the battle. The enemy is actively working to make you fail and fall.
In today's passage, Peter tells us to "arm" ourselves. The word refers to a soldier carefully putting on his armor before battle. The arrows will be flying. He wants to make sure he is ready and protected. Our armor referred to in this verse is an attitude, a willingness to share in the sufferings of Jesus. Until we are ready to die for Him, we aren't ready to live for Him.
The phrase "done with sin" doesn't mean the believer--even one armed and following hard after Christ--will never sin. The phrase means that identifying with Christ in suffering is a clear sign that we have made a break with the sinful life, and we are all in!
Are you all in? You don't have to wait for suffering to come to prove it.
Father, never allow me to treat my faith as a hobby. Never allow me to be satisfied with a half-hearted commitment. Give me the desire to be all in, and the opportunity to demonstrate it every day. In Jesus' name. Amen.