Satan can use your nonChristian friends in [many] ways to get to you. God wants you to rub off on them, but the Enemy wants them to rub off on you. So remember: You can have friends outside the faith, but for your deepest comrades you should look to your brothers and sisters in Christ. Hang out with the holy. Get in with the godly. Spend time with the saved. Know who your real family is – the one where the Father is God.