You're in a spiritual battle every minute that you're awake. You are on one of two sides- the Kingdom of God(through salvation) or the Kingdom of Satan (through physical birth). Are you on God's side or on Satan's side? Well, if you're on a mission for God- you're on God's side!
Joshua 24:15 "Then choose for yourselves right now whom you will serve."(NIRV)
I know that a lot of people know about God but don't follow Him. So that's why Christians have to be a good example to them. You can help too! Some ways to help would be to care for others, serve others, and pray for others!
"Serve wholeheartedly as if you were serving the Lord not man. Because you know that the Lord will reward everyone for whatever good he does whether he is slave or free."
Always be a good example even when you don't feel like it! Because if you are a good example, someone might get saved!!