It not necessary to eat.  It is not necessary to drink.  It is not necessary to live in this world at all.

But it is necessary to learn to crave God.  We have appeared here on earth because of Him.  We live because of Him.  And we are going to return to Him.  Nothing about our body is necessary without Him.  

Let a man dabble in the things of the body without the Lord’s consent and that man will immerse himself in nothing necessary.   He will think he is thriving.   But what shall he say when he finds himself having returned to The One who made him?

All his life he made sure he was not necessary.   How should he be of value then?

By His Grace.