Hebrews 4:10
But not even thus have I attained to the image exactly. For here indeed whatever good things a person may obtain, even should you say the kingdom itself, during the first day indeed his desires are in full vigor, and for the second too, and the third, but as time goes on, he continues indeed to have pleasure, but not so great. For whatever it be, it always ceases from familiarity with it. But yonder it not only does not diminish, but even increases. For consider how great a thing it is, that a soul after departing there, should no longer look for an end of those good things, nor yet change, but increase, and life that has no end, and life set free from all danger, and from all despondency and care, full of cheerfulness and blessings innumerable.
For if when we go out into a plain, and there see the soldiers' tents fixed with curtains, and the spears, and helmets, and bosses of the bucklers glittering, we are lifted up with wonder; but if we also chance to see the king himself running in the midst or even riding with golden armor, we think we have everything; what do you think [it will be] when you see the everlasting tabernacles of the saints pitched in heaven? (For it is said, “They shall receive you into their everlasting tabernacles”) when you see each one of them beaming with light above the rays of the sun, not from brass and steel, but from that glory whose gleamings the eye of man cannot look upon? And this indeed with respect to the men. But what, if one were to speak of the thousands of Angels, of Archangels, of Cherubim, of Seraphim, of thrones, of dominions, of principalities, of powers, whose beauty is inimitable, passing all understanding?
But how far shall I go in pursuing what cannot be overtaken? “For eye has not seen,” it is said, “nor ear heard, neither have entered into the heart of man, the things which God has prepared for them that love Him.” Therefore nothing is more pitiable than those who miss, nor anything more blessed than those who attain. Let us then be of the blessed, that we may attain to the everlasting good things that are in Christ Jesus our Lord, with whom to the Father together with the Holy Ghost be glory, might, honor, now and for ever and world without end. Amen.
Source: Homilies on the Epistle to the Hebrews (New Advent)