However, let's assume for a moment that you *have* found the "One Truth", and that everybody who hasn't done so yet is essentially blind to it, doomed to stumble down some dead-end street unless they're brought to the light.
Do you think that telling them that they're Satan's playthings will convince them of the error of their ways, given that they don't believe in Satan to begin with? Or will that statement only harden them further, driving them even further down the road they are traversing?
Point well taken.
People sometimes point to the fact that Jesus, as per the gospels, called some people nasty names - but do you think that this led to the salvation of the parties he addressed thus? Or did it increase their antagonism?
Our Lord's "nasty names" consisted primarily of "Woe unto you, Scribes, Pharisees, Hypocrites . . . ."(Matthew 23:13-29) directed at those whose hearts had hardened, whose minds had closed, and who were victimizing others--primarily the poor--by the gross misuse of their "religious authority." These He did, indeed, condemn in the strongest of terms.
However, the rest of our Lord's pronouncements--for example, His praying for forgiveness for those who were crucifying Him--were expressions of Love and Compassion. His anger was towards the hypocrites and the poseurs, not the "unsaved."
And last but not least, what was it that brought you around? A preacher telling you that you were a pawn of the Evil One - or was it the Spirit?
Well, it is ALWAYS the Spirit Who does the touching of the Heart necessary for conversion, but the Spirit has to have something material and concrete to work with, as in:
" 'Everyone who calls on the name of the Lord will be saved.' How, then, can they call on the One they have not believed in? And how can they believe in the One of whom they have not heard? And how can they hear without someone preaching to them?" (Romans 10:13-14)
There were many people in my life preaching the Gospel to me--wives, mother-in-laws, eventually my children--but if i had to pick one, it would be my 3rd and last wife whose primary testimony to me was her willingness to stick by me in spite of the abuse i heaped upon her personally and through her Church. (i actually spent some time in jail for shooting out the windows at the Church she attended to "get even" with them for "stealing her affections". How twisted is that?)
Anyway i saw something in her life that i wanted and her Pastor laid out for me what i had to do to appropriate that "something"--or rather Someone--for myself. It took a while for me to swallow my hatred of Christianity and Christians, but eventually, with the Spirit's help, i came around. (MAY HE BE FOREVER PRAISED!)
Of course, if your God exists, he may work in many ways; so maybe you *can* be instrumental in someone's salvation, by telling him just the right words in the right situation, guided by the Spirit. But for the most part, I don't think that it's words that bring people to the light, even if they're quotes from the Bible. If what you believe about the spiritual state of us Non-Christians is correct, then only God can save us. Literally.
Well, again, i thinK the Holy Spirit needs something to work with, and i see preaching and sharing the written Word as necessary to provide a foundation upon which the Spirit can build.
Going along with what you and others have said, it is obvious that one can choose preaching and quotes which highlight God's Love and Grace or, on the other hand, use preaching and quotes which threaten and condemn. i would agree that the former are much more effective than the latter.

ABBA'S FOOL,
ephraim