The passage our question comes from is :
"Do you not say, 'There are yet four months, and then comes the harvest'? Behold, I say to you, lift up your eyes and look on the fields, that they are white for harvest.
You have heard me say many times on this program that we must always view a passage in it’s context. Jesus’ words are delivered to the disciples who were entering into a harvest for which they did not sow. The prophets for 1,300 years had sown the seed of God’s Word, and the disciples of Christ were now going to reap the harvest.
It is the responsibility of the Church to sow the seed.
"And the one on whom seed was sown on the good soil, this is the man who hears the word and understands it; who indeed bears fruit and brings forth, some a hundredfold, some sixty, and some thirty."
When we plant the seed, God will, in His own way, give the increase:
1 Cor 3:6
I planted, Apollos watered, but God was causing the growth.
The fields are not white unto harvest today, in my opinion, where the gospel has not been sown! If in your area you have made a diligent and consistent effort to sow the seed year after year, then and only then will the fields be white unto harvest.