The modern"testimony" as practiced today has become a cancer on the church.
The concept of one's "testimony" is drawn largely from the Book of Acts, in which, in five separate accounts, St. Paul imparts to his hearers knowledge of some aspect of the Christian faith by describing his own religious journey that ended at the foot of Calvary. These five accounts include:
1) Paul's "testimony" before the multitude (Acts 21:40 through 22:21).
2) Paul's "testimony" before the Sanhedrin (Acts 23:1-10).
3) Paul's "testimony" before Felix (Acts 24:10-21).
4) Paul's "testimony" before Festus (Acts 25:10-11 & 19),
5) Paul's "testimony" before Agrippa (Acts 26:1-29).
On systematic examination of these five accounts, following elements can be distilled and catalogued:
a) Paul describes his religious beliefs before coming to faith in Christ, including being a Jew, a Pharisee, and one who hoped in the resurrection (Acts 22:3, Acts 26:4-5, 26:25).
b) Paul describes his attitude and understanding of Jesus Christ before his conversion to Christianity, in that he was hostile to Christ, and a persecutor of Christians (Acts 22:4-5; Acts 26:9-12).
c) Paul recounts the events on the Damascus Road that lead to his conversion to faith in Christ (Acts 22:6-16, Acts 26:13-16).
d) Paul proclaims the atoning death of Jesus Christ (Acts 26:23).
e) Paul proclaims the resurrection of Jesus Christ (Acts 25:19; 26:8-9; 26:23).
f) Paul proclaims the forgiveness of sins through Jesus Christ (Acts 26:18) and
g) Paul proclaims his hope of the resurrection through Jesus Christ (Acts 24:14-15, 24:21, 26:23).
h) Paul tactfully and humbly invites Agrippa to believe (Acts 26:26-29).
Nowhere in any of the five times that Paul gave his "testimony" did he ever discuss how "Jesus Christ changed his life."