"Verily, verily, I say unto you, He that entereth not by the door into the sheepfold, but climbeth up some other way, the same is a thief and a robber.
But he that entereth in by the door is the shepard of the sheep.
To him the porter openeth; and the sheep hear his voice: and he calleth his own sheep by name, and leadeth them out.
And when he putteth forth his own sheep, he goeth before them, and the sheep follow him: for they know his voice.
And a stranger will they not follow, but will flee from him: for they know not the voice of strangers." (the words of Jesus Christ, in John 10:1-5)
Last Days Ministries : What's Wrong With the Gospel? (this is a great and timely article written by Keith Green )