Our Lord plainly told us to evangelize. Neither should our primary motive be to get results. If this is our prime motivation, we will be willing to present a shallow message that doesn't truly glorify our Lord Jesus Christ in order to get results. We must also remember that evangelism and winning arguments are not synonymous. The winning of arguments is a totally human endeavor.
People can win arguments even when they are wrong.
The winning of an argument often alienates the loser so that our audience is lost. Neither do we evangelize by calling attention to all the things that are wrong with the person's religion or life. We evangelize by preaching the scriptural perfection of the Lord Jesus Christ. We must never sully the Gospel messages with half-truth, exaggerations, undue sensationalism or undocumented stories. Be zealous for the truth, as it is the truth that sets men free.