John Gill's Exposition of the Whole Bible
Proverbs 13:12
Hope deferred maketh the heart sick,.... That is, the object hoped for; if it is not enjoyed so soon as expected, at least if it is delayed any length of time, the mind becomes uneasy, the heart sinks and fails, and the man is dispirited and ready to despond, and give up all hope of enjoying the desired blessing; whether it be deliverance from any evil, or the possession of any good;
but [when] the desire cometh, [it is] a tree of life; when that which is hoped and wished for, and has been long expected and desired, comes; when there is an accomplishment of men's wishes, it is as grateful to him as the tree of life was in Eden's garden; it gives him an unspeakable pleasure and delight. This may be applied to many things in a spiritual way, as to the first coming of Christ; and some have thought this is greatly regarded and chiefly intended; this was the object of the hope of Old Testament saints; and it was hoped for on a good foundation, on the promise of God, which was frequently repeated, enlarged, and confirmed; yet this promised and hoped for blessing was deferred a long time; from the first promise of it to its accomplishment were four thousand years; though not deferred longer than the appointed time, yet longer than the saints expected, and which sometimes made their hearts sick; they became weak and feeble, fearful and dispirited, lest it should never come to pass, which occasioned fresh promises and assurances to them; see Isaiah 35:3 Malachi 3:1; but when "the desire" came, Christ the desired object; and who is desirable for the excellencies of his person, his mediatorial qualifications, the work of redemption and salvation he came about, and the blessings he brought with him; and who is the "desire of all nations" that was to come, Haggai 2:7; it was exceeding joyful and delightful to all that expected him, and were looking for redemption in Israel, or Christ; "the coming desire" i, as it may be rendered, is "a tree of life", or "lives", the author of life, natural, spiritual, and eternal; see Proverbs 3:18. It may be applied also to the spiritual presence of Christ, and communion with him; this is what believers, being sometimes without, hope and wait for; and sometimes it is deferred a long time, at least they think it so, which makes them very uneasy, and even sick of love, as the church was, Song of Solomon 5:8; but when what they so earnestly desire is granted them, it is as if they were in Eden's garden, or rather in the paradise above, plucking the fruit of the tree of life: likewise it may be applied to eternal glory and happiness; this is the object of hope in the present state; it is sometimes impatiently expected and desired, and the language of the soul is, "Why is his chariot so long in coming?", "come, Lord Jesus, come quickly", Judges 5:28; and when this desired happiness is enjoyed, how sweet will it be! and the sweeter for having been so much longed and wished for; and when the saints will be in the paradise of God, and eat of the tree of life in the midst of it, and never hunger more.
i תאוה באה "desiderium venieus", V. L. Pagninus, Mercerus, Cocceius, Michaelis, Schultens.