David declares that he desires nothing, either in heaven or in earth, except God alone, and that without God, all other objects which usually draw the hearts of men towards them were unattractive to him. And, undoubtedly, God then obtains from us the glory to which He is entitled, when, instead of being carried first to one object, and then to another, we hold exclusively by Him, being satisfied with Him alone. If we give the smallest portion of our affections to the creatures we in so far defraud God of the honour which belongs to Him. And yet nothing has been more common in all ages than this sacrilege, and it prevails too much at the present day. How small is the number of those who keep their affections fixed on God alone!
From John Calvin, Commentary On The Book Of Psalms, Vol. 3 (Grand Rapids: Eerdmans, 1949), 154.