"Forsake the foolish, and live; and go in the way of understanding." Proverbs 9:6 KJV
There must come a time in the life of every Christian when we put away foolish things. Growth and maturity are signs that the Holy Spirit is indeed living inside of us. Just as one's physical body undergoes puberty to develop, so must the spiritual body undergo its own changes. Our relationship with God through Christ Jesus should develop into a deeper, more profound, more pronounced kinship as we grow in the way of understanding.
Maybe people couldn't tell if you were Christian five years ago, but do they still wonder today? If your actions, speech, and attitude still betray your faith, perhaps you should spend more time in prayer and Bible study. It is utter foolishness to pretend to be a follower of Christ. Pretenders don't have all the benefits: perfect peace, unspeakable joy, etc. Pretenders don't understand the power they could have over their flesh through the Holy Spirit. Pretenders have no authority over the enemy, and are therefore defeated.
Let the foolishness go! Live abundantly! Listen to what God's Word is saying to you. This particular plan is simple enough. Grow up in Christ, and see how much better life can be. Jesus came so that we can live, and that's just what I'm going to do: live! What say you?