This is a very sobering thought right...if you read the full text Matt7:21-23 you will see even those who cast out demons in His name and prophecied in His name may be told to depart from Him...why you may ask"Because as He says "I never knew you"....Heaven and Hell are very real.Personally i dont want to hear those words " I never knew you" so i try to have an intimate relationship with Him...it is soo easy to get caught in doing sooo many wonderful things for Him and in His Name that you actually forget about Him in the process how do i know this"Because I have done it before,until the Holy Spirit laid it upon my heart to stop and acknowledge Him...stay connected to the True Vine to our Judge to our Saviour and let Him be Lord over every part of us and over all of our lives...He wants to know us intimately...