Don't work for the food which perishes, but for the food which remains to eternal life, which the Son of Man will give to you. For God the Father has sealed him."
But there are some of you that believe not. For Jesus knew from the beginning who they were that believed not, and who would betray him. And he said, Therefore I said unto you, that no man can come unto me, except it were given unto him of my Father ( John 6:64-65 ).