My point is that my co-worker is a real Ambassador of his cause. His cause is not one that I agree with, but his zeal for his cause is infectious. He loves his cause so much that he will talk about it endlessly with me, someone he knows does not believe a thing he is saying. If you are like me, you can't handle another job right now, life is crazy enough. Actually, being an ambassador for Christ is not really another job, it is our only job.
Zeal is interesting.
It can be a real turn off at times. This can especially be true with Christians. From the perspective of the believer the Gospel is a wonderful comfort and joy. Not so if you know what the Gospel says and reject it as false. It is very offending.