The reaping of spiritual harvest

John 4:32-38 But he said unto them, I have meat to eat that ye know not of.
33 Therefore said the disciples one to another, Hath any man brought him ought to eat?
34 Jesus saith unto them, My meat is to do the will of him that sent me, and to finish his work.
35 Say not ye, There are yet four months, and then cometh harvest? behold, I say unto you, Lift up your eyes, and look on the fields; for they are white already to harvest.
36 And he that reapeth receiveth wages, and gathereth fruit unto life eternal: that both he that soweth and he that reapeth may rejoice together.
37 And herein is that saying true, One soweth, and another reapeth.
38 I sent you to reap that whereon ye bestowed no labour: other men laboured, and ye are entered into their labours.

Obviously here Jesus referred to spiritual food which brings much happiness and is capable of sustaining Him. His sustenance is the happiness that He gets when people change and accept His Word. He went on to say that His sustenance is to do the Will of God Who sent Him. If He can do that then He is happy and filled. He is sustained. That for Him is the elixir of life.

He then referred His disciples to look around them at the people. They are ripe for spiritual help. They are ready to hear of the Word and all that the disciples have to do is speak with them. Others have laboured, which means the prophets of old who preceded them have done all the work including John the Baptist in preparing this people for spiritual salvation. The easy part is what the disciples have to do, which is speak to them about the Kingdom of God. They will listen and accept. The experiences over millennia and the work of prophets have brought these people to a point in their spiritual development where it would be easy to make them understand more about the Kingdom of God.

The seeds had already been sown by others in the spirits of these people. These seeds has blossomed, it has ripened and it is now ready for harvest. Others have done the hard work he tells them and is now sending them out to reap what others have sown. To complete what others had started.