A couple of years ago a Christian made a list of phrases that he never says to non believers. It is quite entertaining. The problem is Christians are taught to say these things even though they should not. I'll discuss a few of them.
One of the ones most used on me is, Do you know you will die and spend eternity in hell?
I know I will die, but neither you nor I know anyone who came back and told us of eternity in either hell nor heaven.