Thou shalt come to thy grave - Thou shalt not die before thy time; thou shalt depart from life like a full-fed guest; happy in what thou hast known, and in what thou hast enjoyed.
Like as a shock of corn - Thou shalt completely run through the round of the spring, summer, autumn, and winter of life; and thou shalt be buried like a wholesome seed in the earth; from which thou shalt again rise up into an eternal spring!
Notes on the Whole Bible
Thou shalt come to thy grave in full age - That is, thou shalt have long life; thou shalt not be cut down prematurely, nor by any sudden calamity. It is to be remembered that long life was regarded as an eminent blessing in ancient times; see the notes at Isaiah 65:22.
Like as a shock of corn cometh in in his season - Margin, “ascendeth.” As a sheaf of grain is harvested when it is fully ripe. This is a beautiful comparison, and the meaning is obvious. He would not be cut off before his plans were fully matured; before the fruits of righteousness had ripened in his life. He would be taken away when he was ripe for heaven - as the yellow grain is for the harvest. Grain is not cut down when it is green; and the meaning of Eliphaz is, that it is as desirable that man should live to a good old age before he is gathered to his fathers, as it is that grain should be suffered to stand until it is fully ripe.
Concise Bible Commentary
Eliphaz gives to Job a word of caution and exhortation: Despise not thou the chastening of the Almighty. Call it a chastening, which comes from the Father's love, and is for the child's good; and notice it as a messenger from Heaven. Eliphaz also encourages Job to submit to his condition. A good man is happy though he be afflicted, for he has not lost his enjoyment of God, nor his title to heaven; nay, he is happy because he is afflicted. Correction mortifies his corruptions, weans his heart from the world, draws him nearer to God, brings him to his Bible, brings him to his knees. Though God wounds, yet he supports his people under afflictions, and in due time delivers them. Making a wound is sometimes part of a cure. Eliphaz gives Job precious promises of what God would do for him, if he humbled himself. Whatever troubles good men may be in, they shall do them no real harm. Being kept from sin, they are kept from the evil of trouble. And if the servants of Christ are not delivered from outward troubles, they are delivered by them, and while overcome by one trouble, they conquer all. Whatever is maliciously said against them shall not hurt them. They shall have wisdom and grace to manage their concerns. The greatest blessing, both in our employments and in our enjoyments, is to be kept from sin. They shall finish their course with joy and honour. That man lives long enough who has done his work, and is fit for another world. It is a mercy to die seasonably, as the corn is cut and housed when fully ripe; not till then, but then not suffered to stand any longer. Our times are in God's hands; it is well they are so. Believers are not to expect great wealth, long life, or to be free from trials. But all will be ordered for the best. And remark from Job's history, that steadiness of mind and heart under trial, is one of the highest attainments of faith. There is little exercise for faith when all things go well. But if God raises a storm, permits the enemy to send wave after wave, and seemingly stands aloof from our prayers, then, still to hang on and trust God, when we cannot trace him, this is the patience of the saints. Blessed Saviour! how sweet it is to look unto thee, the Author and Finisher of faith, in such moments!