Jared Wilson has a post in which he outlines the ways in which Christians generally, and preachers in particular, can leave Jesus out of our message.  To summarise:-

1.  We speak in vague spiritual generalities.  We talk about love, joy, hope, peace, blessings, but divorced from Christ himself as the incarnate, crucified and risen Saviour and Lord.  Our message is pleasant and up-beat; inspirational, even.  But, separated from Christ, who is himself our joy, our hope, our peace and so on, it’s rubbish.

2.  We speak of Christ only as a moral exemplar.  We tell people to be good because Jesus was good.  We deal with imperatives (‘be like Jesus’), but neglect the indicatives (‘Christ died for sins’).

3.  We avoid the real problem – sin.  And because of this we avoid the real solution – the cross.  So, in many churches, sin and the cross are scarcely mentioned.  Or, if the cross is mentioned, it is only as a demonstration of the love of God and not at all as a sacrifice for sin.

Friends, let us resolve to know nothing except Jesus Christ and him crucified. (1 Corinthians 2:2).