"The Substance"

 "For my flesh is meat indeed, and my blood is drink indeed." (John 6:54 KJV)

  "There be many that say, Who will show us any good? LORD, lift thou up the light of thy countenance upon us. Thou hast put gladness in my heart, more than in the time that their corn and their wine increased. I will both lay me down in peace, and sleep: for thou, LORD, only makest me dwell in safety." (Psalms 4:6-8 KJV)

 If you have ever really hungered, then you might understand what it means to really desire to be feed; to need nourishment enough to be able to live, because you feel as though your very life depends upon it! Well, the substance of what is being said, that is pretty much the point that Jesus is making. If you do not, personally, eat and drink of Him, then you are not going to live! 

 No one else can eat a meal or drink any fluid, that will cause your thirst or hunger to be satisfied; so it is totally left upon you to do what is needed to have a Spirit filled life! And it is only Jesus who can give you what you need, both meat and drink, to give you the life to live in the Spirit, by His Spirit living in you.

 Yes, I know, it is pretty much one way, and there are many that don't feel as though that is right; but it is the only way, because only Jesus can provide us with eternal life...

"And we know that the Son of God is come, and hath given us an understanding, that we may know him that is true; and we are in him that is true, even in his Son Jesus Christ. This is the true God, and eternal life." (1 John 5:20 KJV)