And the seventy returned again with joy, saying, Lord, even the devils are subject unto us through thy name. And he said unto them, I beheld Satan as lightning fall from heaven. Behold, I give unto you power to tread on serpents and scorpions, and over all the power of the enemy: and nothing shall by any means hurt you. Notwithstanding in this rejoice not, that the spirits are subject unto you; but rather rejoice, because your names are written in heaven. In that hour Jesus rejoiced in spirit, and said, I thank thee, O Father, Lord of heaven and earth, that thou hast hid these things from the wise and prudent, and hast revealed them unto babes: even so, Father; for so it seemed good in thy sight. All things are delivered to me of my Father: and no man knoweth who the Son is, but the Father; and who the Father is, but the Son, and he to whom the Son will reveal him. And he turned him unto his disciples, and said privately, Blessed are the eyes which see the things that ye see: For I tell you, that many prophets and kings have desired to see those things which ye see, and have not seen them; and to hear those things which ye hear, and have not heard them.

Luke 10:17-24

Seasons of a fruitful harvest in all are filled with joy. A natural harvest and much more a spiritual harvest. The Bible says, there is joy in heaven for one sinner that repents. The sower and the reaper all share in the joy of the harvest. Those that bear the precious seed can expect to return with the joy of harvest. The disciples were admonished by the Lord what not to rejoice for and what to really rejoice for. Rejoice that your name is written in heaven. Any service rendered to the Lord must be seasoned with joy.