Since his soul, then, was thus united to God it is small wonder the Brethren saw him rapt in ecstasy and with his face bathed in tears as he stood in choir and sang the _Antiphon_ wont to be sung according to the Dominican Office for Compline during Lent: "_Ne projicias nos in tempore senectutis: cum defecerit virtus nostra, ne derelinquas nos Domine_."[18] In the year 1274 the Saint was summoned by Pope Gregory X. to the Council about to be held at Lyons. He set out, taking with him his _Treatise against the Errors of the Greek Schismatics_, for the great question which the Pope had at heart was the settlement of the Schism between the East and the West. But the Council was never to see Thomas, for he fell ill when traversing the Campagna, and though he was able to reach the Cistercian Abbey of Fossa Nuova he reached it only to die. "_This is my rest for ever and ever_," he said as he entered the gates. "_Here will I dwell, for I have chosen it._" And here, as he lay dying, he expounded to the monks who stood round that most sublime of all the Books of the Bible, the _Canticle of Canticles_: "_Behold, my Beloved speaketh to me: Arise, make haste, my love, my dove, my beautiful one, and come.... I sleep, and my heart watcheth; the voice of my Beloved Who is knocking!... My Beloved to me and I to Him Who feedeth among the lilies: till the Day break and the shadows retire!_" As the time of his summons drew on he asked for the Holy Viaticum. And, in the words of William of Tocco, "when It was brought with devout reverence by the Abbot and the monks, he prostrated himself on the ground, weak indeed in body but mighty in spirit, and so came to meet his Lord with tears."