Jesus said to them, “I am the bread of life. The one who comes to me will never go hungry, and the one who believes in me will never be thirsty… Everyone whom the Father gives me will come to me, and the one who comes to me I will never send away. For I have come down from heaven not to do my own will but the will of the one who sent me. Now this is the will of the one who sent me—that I should not lose one person of every one he has given me, but raise them all up at the last day. For this is the will of my Father—for everyone who looks on the Son and believes in him to have eternal life, and I will raise him up at the last day.” (John 6:35-40 — NET)
Jesus is talking to the people He had fed the day before with the miraculous multiplication of a few loaves of bread and some fish. They were so excited about receiving this physical food that they were thinking of making Jesus their king. But Jesus wanted them to look beyond the physical food and drink. He wanted them to see what the miracle really meant—what God was trying to reveal to them.
In those days the main food was bread. If there was bread to eat, the people lived; when there was no bread, the people died. So when Jesus said that He was the bread of life, it was a powerful and amazing statement. It communicated that He was the One that enabled people to achieve real life. All physical and spiritual life comes from the Lord Jesus. When we really have Him, we have the Source of absolutely everything we need. This is why He said that those who believed in Him would never be hungry or thirsty again.
He must be the main thing we seek in life. Without Jesus our lives are a waste and will end in disaster. With Jesus we have everything anyone could need. He is the One and Only Savior, sent by the Father in heaven into this world.