In Acts 1:8, Jesus told the disciples to stay in Jerusalem to wait for the power of the Holy Spirit, He said, “But ye shall receive power, after that the Holy Spirit is come upon you: and ye shall be witnesses unto me both in Jerusalem, and in all Judea, and in Samaria, and unto the uttermost part of the earth.” Notice He said that the disciples would be witnesses “after” the Holy Spirit came upon them. To witness and testify powerfully about the resurrected Christ, supernatural power is required.
Hence, without the Holy Spirit’s assistance, it is almost impossible to testify with confidence about Jesus Christ. Certainly there is nothing wrong with pre- planned evangelism, door-to-door visitation, or evangelism programs that teach you the basics of witnessing. But when those programs are carried out without the power of the Holy Spirit, they are often dry, dead, and unsatisfying. Real witnessing or testifying of Jesus Christ can only be done by the power of the Holy Spirit!