Deuteronomy 8:3 And He humbled you and let you go hungry, and fed you with the manna which you did not know, nor did your fathers know, in order to make you [a]understand that man shall not live on bread alone, but man shall live on everything that comes out of the mouth of the Lord.
The people of Israel day by day went to collect the manna that God sent from heaven, we spiritual Israel must also day by day come before God and receive the manna.
Knowing and knowing that Jesus Christ is the manna, and that Jesus Christ is the word of God revealed to all of us who have known his name.