The first thing I thought of was this:
No one is beyond the grace of God; unless and until, they flat out refuse Him to their death.
Since satan is “a liar and the father of them”, I tend to see your dream [vision], as more of an attempt from satan to discourage you from sharing the Gospel of Jesus Christ.
The MOST important thing to remember, is that one must actually and in truth, belong to Jesus Christ their self, before attempting to witness for Him.
Second to that, one should be into the Word of God and in conversation [prayer] with Him on a daily basis.
The closer one draws to the Lord, the more satan will try to resist.