Why should a Christian witness? This is how Penn Jillette, an ardent atheist, answered that question:
I don’t respect people who don’t proselytize. I don’t respect that at all. If you believe that there’s a Heaven and Hell, and people could be going to Hell, or not getting eternal life, or whatever, and you think that, well, it’s not really worth telling ’em this because it would make it socially awkward…
How much do you have to hate somebody to not proselytize?
How much do you have to hate somebody to believe that everlasting life is possible and not tell them that?I mean, if I believed beyond a shadow of a doubt that a truck was going to hit you and you didn’t believe it–if that truck was bearing down on you, there’s a certain point where I tackle you.
And this is more important than that.”