Faith vs Knowledge
John 4:22, 25 - In the New Living Translation ... "You Samaritans know so little about the one you worship, while we Jews know all about him... The woman said, "I know the Messiah will come--the one who is called Christ. When he comes, he will explain everything to us."
The Jews spent 100's of generations trying to explain the scriptures and to define God. The Samaritan's (this one at least) had a different strategy. Faith! Her answer, "The Messiah will come! And when he does he will explain everything." Which is EXACTLY what Jesus has just been doing! No wonder she recognised and believe Jesus when he said, "I am the Messiah!"
Satisfied by Sharing
John 4:31-34 NLT
Meanwhile, the disciples were urging Jesus to eat. "No," he said, "I have food you don't know about."
"Who brought it to him?" the disciples asked each other.
Then Jesus explained: "My nourishment comes from doing the will of God, who sent me, and from finishing his work.
Leading people to salvation brought Jesus such joy that even his physical needs were satisfied (or at least forgotten!) by finding and reclaiming the lost fo the Kingdom.
When you are doing something that abosrbs all your energy and concentration you often forget about food, drink and even sleep. This is obviously the way Jesus was about sharing himself with others. Oh, that we would be the same!