When I was around 12 or 13 years old my Papa, Rev C A Zweck OBE, gave me a bundle of his old sermons.  The sermon atop was his last sermon at the second parish he served (33 years there at Zion Glynde SA). Thanks to him it seems I too have the perfect text to base my farewell sermon on. Maybe before you hear it you can think through why St Paul focussed so solely on the cross of Christ as the centre of his message.  Is that your focus in your walk with the Holy Spirit?  What do you gain in making it so?  What do you lose when it’s not?