The latter rain is the last gospel invitation before the close of probation. It is the ultimate, premillennial call to accept the Lord's complete system of truth. The Lord will again empower large numbers of disciples with the sign gifts as evidence of His power. Praying for the latter rain to fall is serious business. Whenever something true appears, Satan supplies a counterfeit.
Spiritual gifts are no exception.
For instance, divine healing is all too easy to falsify. Speaking in tongues is a perennial problem for many churches. Outbreaks of self-proclaimed prophets and apostles cause incredible difficulties in many church communions. There have been periodic outbreaks of Pentecostal-type movements in Adventist history. An interesting one was the case of a Mr. and Mrs. Mackin.