Deacons can give homilies, too. It is one of their functions, both to read the Gospel and to preach it.
Yes, and I did enjoy hearing the young or not so young deacons preach.
The memory of God should be treasured in our hearts like the precious pearl mentioned in the Holy Gospel. Our life's goal should be to nurture and contemplate God always within, and never let it depart, for this steadfastness will drive demons away from us. - Paraphrased from St. Philotheus of Sinai
Writings from the Philokalia: On Prayer of the Heart,
Translated from the Russian by E. Kadloubovksy and G.E.H. Palmer, Faber and Faber, London, Boston, 1992 printing.