Man will not live on bread alone

Jesus said: man shall not live by bread alone but also by every word that comes out of the mouth of God. Matthew 4: 4

Those words can be found in the bible.
You have a physical body, a soul and a spirit, your physical body needs food to live, and your spirit needs that heavenly bread to live.
Give your spirit to eat that bread, nourish it, strengthen it, because Jesus said so.

God bless you