What we think about, what we put into our minds, this stuff is the food. Will it give strength to the flesh or the spirit?
"Jesus said to them, 'My food is to do the will of Him who sent Me, and to accomplish His work.'"John 4:34
"man does not live by bread alone, but man lives by everything that proceeds out of the mouth of the LORD." Deuteronomy 8:3b
"For the mind set on the flesh (sinful impulses) is death, but the mind set on the Spirit is life and peace, because the mind set on the flesh is hostile toward God; for it does not subject itself to the law of God, for it is not even able to do so." Romans 8:6-7
"Therefore putting aside all filthiness and all that remains of wickedness, in humility receive the word implanted which is able to save your souls." James 1:21