that sacrifice and covenanting for a vast length of time, were observed together, they were not coeval. But however that may be, equally with the one, the other, in the first ages, was known; and to one fact both are to be traced. The duties co-ordinate in their bearings--the one pointing to the great propitiation, the other rocognising the claims of the Author of that salvation which the "One Sacrifice" was to secure, both have their origin in that one glorious Covenant, by which the method in which it should be bestowed was arranged. Provision was made through promises. Some of these were that the duty would be engaged in;[409] others of them, that the keeping of engagements made would be followed with good;[410] others, that all the blessings of the covenant would be bestowed.[411] The passages belonging to each of these classes are numerous. Containing a proposal of conditions on God's part, they lead directly to the duty. What is wanting, is the acceptance of them on the part of man. So often as they are read or meditated on, or pressed on sinners in the preaching of the gospel, the sinner is invited to take hold in God's covenant. The invitations addressed through them are made by the Redeemer as the Prophet of his Church, and as the Lord of all. They exhibit the will of the Father, that his people should acknowledge him as the God of grace. They testify to the love of the Spirit, whose work it is to lead to accept of them. They unfold the purposes which were of old. They are the echo of the promises of the Everlasting Covenant, made to the great Mediator between God and man.