When you became a Christian, you prayed the prayer for your salvation, got water-baptized, and began to tell people that you've become a Christian.  Some of them will try to talk you out of being "one of us", and if they should succeed, you didn't become born again because you didn't have the revelation knowledge you needed to believe it. 

Galatians 4:1-8  The Message Bible ... As long as the heir is a  minor, he has no advantage over the slave.  Though legally he owns the entire inheritance, he is subject to tutors and administrators until whatever date the father has set for emancipation.  That is the way it is with us.  When we were minors, we were just like slaves ordered around by simple instructions (the tutors and administrators of this world), with no say in the conduct of our own lives.  But when the time arrived that was set by God the Father, He sent His Son, born among us of a woman, born under the conditions of the Law so that He might redeem us because we all have been kidnapped by the Law.  Thus we have been set free to experience our rightful heritage.  You can tell for sure that you are now fully adopted as His own children because God sent the Spirit of His Son into our lives crying out, "Papa, Father!".  Doesn't that privilege of intimate conversation with God make it plain that you are not a slave, but a child?  And if you are a child you're also an heir, with complete access to the inheritance! 

We have to live our lives and get past the trash we had before.  We've all had trash that we need to overcome and we cannot do this when we're still living in it.  But now as Chtistians with Jesus as Lord of our lives, we can overcome [be overcomers] ... and we must.  If we're having problems as Christians, we have to step back and look at what's still in our lives and get rid of all of it.

Reverend Robert W. & Mary C. Butler