Psalm 126:5,6 They that sow in tears shall reap in joy. He that goeth forth and weepeth, bearing precious seed, shall doubtless come again with rejoicing, bringing his sheaves with him.
The message we've been given to carry to the world is precious. The "Good News" is that God loves man and died to save him, then arose from the dead to offer justification and eternal life.
The Spirit of God is precious because He goes with us when we witness. He gives us the words to speak. He gouges the heart of the lost person.
We need God to break our hearts over the condition of the lost, to make us bold witnesses. We need to tell others what Christ did in us and what He can do for them. They must know they are sinners in need of a Savior.
The harvest is the Lord's. We rejoice when a sinner is saved.
John 4:35 . . . . Lift up your eyes and look on the fields; for they are white already to harvest.