"With length of days will I satisfy him" [Psalm 91:16]. What is length of days? Eternal life. Brethren, imagine not that length of days is spoken of in the same sense as days are said to be long in summer, short in winter. Hath he such days to give us? That length is one that has no end, eternal life, that is promised us in long days. And truly, since this suffices, with reason he says, "will I satisfy him." What is long in time, if it has an end, satisfies us not: for that reason it should not be even called long. And if we are covetous, we ought to be covetous of eternal life: long for such a life, as has no end. Lo, a line in which our covetousness may be extended. Do you wish money without limit? Long for eternal life without limit. Do you wish that your possession may have no end? Seek for eternal life. "I will show him my salvation." Nor is this, my brethren, to be briefly passed over. "I will show him my salvation:" He means, I will show him Christ Himself. Why? Was He not seen on earth? What great thing has He to show us? But He did not appear such as we shall see Him. He appeared in that shape in which those who saw Him crucified Him: behold, those who saw Him, crucified Him: we have not seen Him, yet we have believed. They had eyes, have not we? Yea, we too have the eyes of the heart: but, as yet we see through faith, not by sight. When will it be sight? When shall we, as the Apostle says, see Him "face to face"? [1 Corinthians 13:12] which God promises us as the high reward of all our toils. Whatever you toil in, you toil for this purpose, that you may see Him. Some great thing it is we are to see, since all our reward is seeing; and our Lord Jesus Christ is that very great sight. He who appeared humble, will Himself appear great, and will rejoice us, as He is even now seen of His Angels....Let us love and imitate Him: let us run after his ointments, as is said in the Song of Solomon: "Because of the savour of your good ointments, we will run after you." [Song of Songs 1:3] For He came, and gave forth a savour that filled the world. Whence was that fragrance? From heaven. Follow then towards heaven, if you do not answer falsely when it is said, "Lift up your hearts," lift up your thoughts, your love, your hope: that it may not rot upon the earth...."For wherever your treasure is, there will be your heart also." [Matthew 6:21]
[AD 430] Augustine of Hippo on Psalms 91:16