REVELATION 3:20

Here is a controversial item concerning the founder of Campus Crusade for Christ, Bill Bright. One of his most important insights or innovations, depending on your point of view, was to start with this famous passage, “Behold, I stand at the door and knock. If anyone hears My voice and opens the door, I will come in to him and will dine with him, and he with Me.” (Revelation 3:20) Bright applied this verse to evangelizing the lost. The whole concept of letting Jesus into your heart in the Sinner's Prayer and the Four Spiritual Laws is based on this verse. 

The problem is that taken in its original context at the very end of the letters to the seven churches, this verse is not addressed to non-believers at all. It is a call to us as Christians to let Jesus back into our individual lives and congregations when we have shut him out. So some feel that Bright was not only taking some undue liberties with Scripture, but that his ideas have furthered the concept of cheap grace. Just raise your hand and say a few words and you will be saved for life. 

Others feel that criticism is unfair, and that Bright's application is a valid extension of what Jesus was saying even if it does depart quite a bit from the original meaning. I'll leave it up to you to decide.