My devotion time finds me in the book of Acts. I was struck afresh how Peter and the disciples made preaching the gospel very personal to their hearers.
Acts 2:23 - "... this Jesus, delivered up according to the definite plan and foreknowledge of God, YOU crucified and killed ..."
Acts 3:14 & 15 - "But YOU denied the Holy and Righteous One ... and YOU killed the Author of life ..."
Acts 4:10 - "... let it be known to all of you and to all people of Israel that by the name of Jesus Christ of Nazareth, whom YOU crucified ..."
Acts 5:30 - "The God of our fathers raised Jesus, whom YOU killed ..."
(All quotes taken from the ESV. Emphasis added)
Do we do that in our presentation of the gospel? Would it effect the hearer? We can't be afraid to remind unbelievers that it was for THEIR sin that Jesus died, as surely as if they were standing there when it happened. Until they see their sin for what it is, they won't see their need for a Savior.