He is to Come Again
To prevent his disciples from asking the time of his coming, Christ said: About that hour no one knows, neither the angels nor the Son. It is not for you to know times or moments. He has kept those things hidden so that we may keep watch, each of us thinking that he will come in our own day. If he had revealed the time of his coming, his coming would have lost its savor: it would no longer be an object of yearning for the nations and the age in which it will be revealed. He promised that he would come but did not say when he would come, and so all generations and ages await him eagerly.
…As holy men and prophets waited for him, thinking that he would reveal himself in their own day, so today each of the faithful longs to welcome him in his own day, because Christ has not made plain the day of his coming.
From a commentary on the Diatessaron by Saint
Are you among the faithful people