Unless it needs the death and resurrection of Jesus to make sense, it’s not a sermon, it’s a motivational talk.
“We ought to preach in such a way that, if Jesus has not been raised from the dead, then our sermons are utterly incomprehensible. Faithful sermons require the presence of the Holy Spirit to make them work. If Jesus has not been raised from the dead and has not returned to us to continue the conversation, then we preachers ought to fall flat on our faces.”
William H. Willimon – Proclamation And Theology pg 83.