Jesus teaches a needed lesson to those disciples who, continually thing in physical, temporal terms. He wants them to understand there are two types of food, physical and spiritual. One will leave you hungering and thirsting, the other will fill you so that you will never hunger or thirst again. To this point Jesus taught, “Do not labor for the food which perishes, but for the food which endures to everlasting life, which the Son of Man will give you, because God the Father has set His seal on Him” (John 6:27).
"God is Spirit, and those who worship Him must worship in spirit and truth." (John 4:24)
