Christians have been instructed to share the Good News, but this evangelising does not always result in gratitude from the recipient and the Christian accepts this. But clearing evangelism can go too far and become proselytism.
On her blog, Eeka describes an email that she received from a Christian, who effectively claimed to have read her blog but clearly had not. It was obvious he was sending the email to every blog author whose details he could get his hands on.
She was offended at his attempts at influencing her views, without taking the time to read and understand where she was coming from.
The lesson here for Christians is that the Christian message can be very hard to hear. And if Christians are going to maximise the likelihood of people actually listening to it, they had better make the effort to not only understand their audience, but show a genuine interest in them as Christ did.
Semi-related Reverand Fun cartoon: Evandalism