30 Dec '17 13:29>1 edit
"Behold, I stand at the door and knock; if anyone hears My voice and opens the door, then I will come int to him and dine with him and he with Me.
He who overcomes, to him I will give to sit with Me on My throne, as I also overcame sat with My Father on His throne." (Rev. 3:20,21)
Verse 20 has been used for gospel preaching. I think this is borrowing the verse, which certainly can be done. But the context is that Christ is speaking here to the church and not to unbelievers.
It is OK to borrow verse 20 for encouraging the unbeliever to open his heart to let the Lord Jesus in.
But that is a kind of borrowing the passage somewhat out of its context.