Charles H. Spurgeon on Psalms 61:5

The heritage. Eternal life is called an inheritance. Theodoret remarks: "The true inheritance is eternal life, concerning which Christ saith to the sheep on his right hand, Come, ye blessed of my Father, inherit the kingdom prepared for you before the foundation of the world. This inheritance the Lord giveth to them that fear him." In Eph 1:14, the Spirit is called "the earnest of our inheritance." In Col 1:12, the apostle exhorts them "to give thanks unto the Father, who hath made them meet to be partakers of the inheritance of the saints in light." On this verse we have the golden comment of Chrysostom, reiterated by Theophylact. He calls it an inheritance, to show that no man obtaineth the kingdom by his own good works; for no man hath so lived as to render himself worthy of the kingdom, but all is of the grace of God. Wherefore he saith, "When ye have done all, say that we are unprofitable servants, for we have only done that which we ought to have done." John Caspar Suicer's "Thesaurus," 1728.