But ye shall receive power, after that the Holy Ghost is come upon you: and ye shall be witnesses unto me…unto the uttermost part of the earth.
The popular notion that the first obligation of the Christian Church is to spread the gospel to the uttermost parts of the earth is false!
Her first obligation is to be spiritually worthy to spread the gospel.
Our Lord said “Go ye” but He also said “Tarry ye,” and the tarrying had to come before the going. Had the disciples gone forth as missionaries before the day of Pentecost it would have been an overwhelming spiritual disaster, for they could have done no more than make converts after their own likeness, and this would have altered for the worse the whole history of the Western world and had consequences throughout the ages to come.
Theoretically the seed, being the Word of God, should produce the same kind of fruit regardless of the spiritual condition of those who scatter it; but it does not work that way! The identical message preached to the heathen by men of differing degrees of godliness will produce different kinds of converts and result in a quality of Christianity varying according to the purity and power of those who preach it.
Christianity will always reproduce after its kind. A worldly minded, unspiritual church, when she crosses the ocean to give her witness to peoples of other tongues and cultures, is sure to bring forth on other shores a Christianity much like her own!