Apologetics

  Apologetics is the branch of Christianity that deals with the defense and establishment of the Christian faith.  Christian Apologetics is something every true believer should be involved in, even if it is only a little.

"But sanctify Christ as Lord in your hearts, always being ready to make a defense to everyone who asks you to give an account for the hope that is in you, yet with gentleness and reverence," (1 Peter 3:15).

 http://carm.org/apologetics

An Introduction to Apologetics

by Matt Slick

The word "apologetics" comes from the Greek word "apologia," pronounced "ap-ol-og-ee’-ah." It means, "a verbal defense." It is used eight times in the New Testament: Acts 22:1; 25:16; 1 Cor. 9:3; 2 Cor. 10:5-6; Phil. 1:7; 2 Tim. 4:16, and 1 Pet. 3:15. But it is the last verse that is most commonly associated with Christian apologetics.

"....but sanctify Christ as Lord in your hearts, always being ready to make a defense to everyone who asks you to give an account for the hope that is in you, yet with gentleness and reverence" (1 Pet. 3:15, NASB).

"Apologetics is the work of convincing people to change their views."

http://carm.org/introduction-apologetics