21 “For I am a sojourner with You.” But with whom am I a “sojourner”? When I was with the devil, I was a “sojourner;” but then I had a bad host and entertainer; now, however, I am with You; but I am a “sojourner” still. What is meant by a sojourner? I am a “sojourner” in the place from which I am to remove; not in the place where I am to dwell for ever. The place where I am to abide for ever, should be rather called my home. In the place from which I am to remove I am a “sojourner;” but yet it is with my God that I am a sojourner, with whom I am hereafter to abide, when I have reached my home.
But what home is that to which you are to remove from this estate of a sojourner? Recognise that home, of which the Apostle speaks, “We have an habitation of God, an house not made with hands, eternal in the Heavens.” If this house is eternal in the Heavens, when we have come to it, we shall not be sojourners any more. For how should you be a sojourner in an eternal home? But here, where the Master of the house is some day to say to you, “Remove,” while you yourself know not when He will say it, be thou in readiness.
And by longing for your eternal home, you will be keeping yourself in readiness for it. And be not angry with Him, because He gives you notice to remove, when He Himself pleases. For He made no covenant with you, nor did He bind Himself by any engagement; nor did you enter upon the tenancy of this house on a certain stipulation for a definite term: you are to quit, when it is its Master's pleasure. For therefore is it that you now dwell there free of charge. “For I am a sojourner with You, and a stranger.”
Therefore it is there is my country: it is there is my home. “I am a sojourner with You, and a stranger.” Here too is understood “with You.” For many are strangers with the devil: but they who have already believed and are faithful, are, it is true, “strangers” as yet, because they have not yet come to that country and to that home: but still they are strangers with God. For so long as we are in the body, we are strangers from the Lord, and we desire, whether we are strangers, or abiding here, “we may be accepted with Him.” I am a “sojourner with You; and a stranger, as all my fathers were.” If then I am as all my fathers were, shall I say that I will not remove, when they have removed? Am I to lodge here on other terms, than those on which they lodged here also?...
Source: The Enarrations, or Expositions, on the Psalms (New Advent)