The homily emphasized the three major acts of Jesus during the His Last Supper. He gives His disciples the Eucharist by breaking bread that has become His body and pouring out wine that has become His blood. He then washes their feet, demonstrating that they must serve one another. He also tells them to do these things in memory of Him.
Jesus's ministry has always been about service to one another. His final evening with His disciples emphasizes that message. If we are to be like Him, we must serve others until our bodies break and our blood pours out. We must be willing to give of ourselves completely, to love completely.