_Direct._ III. Labour for the truest knowledge of the God whom you worship. Let it not be said of you, as Christ said to the Samaritan woman, John iv. 22, "Ye worship ye know not what;" nor as it is said of the Athenians, whose altar was inscribed, "To the unknown God," Acts xvii. 23. You must know whom you worship; or else you cannot worship him with the heart, nor worship him sincerely and acceptably, though you were at never so great labour and cost: God hath no "pleasure in the sacrifice of fools," Eccles. v. 1, 4. Though no man know him perfectly, you must know him truly. And though God taketh not every man for a blasphemer, and denier of his attributes, whom contentious, peevish wranglers call so, because they consequentially cross some espoused opinions of theirs; yet real misunderstanding of God's nature and attributes is dangerous, and tendeth to corrupt his worship by the corrupting of the worshippers. For such as you take God to be, such worship you will offer him; for your worship is but the honourable acknowledgment of his perfections; and mistakingly to praise him for supposed imperfections, is to dishonour him and dispraise him. If to know God be your eternal life, it must needs be the life of all your worship. Take heed therefore of ignorance and error about God. _Direct._ IV. Understand the office of Jesus Christ as our great High Priest, by whose mediation alone we must have access to God.[5] Whether there should have been any priesthood for sacrifice or intercession if there had been no sin, the Scripture telleth us not expressly; but we have great reason to conjecture there would have been none, because there would not have been any reasons for the exercise of such an office. But since the fall, not only the Scriptures, but the practice of the whole world, doth tell us that the sinful people are unmeet immediately thus to come to God, but that they must come by the mediation of the priest, as a sacrificer and intercessor. So that either nature teacheth sinners the necessity of some mediator, or the tradition of the church hath dispersed the knowledge of it through the world: and certainly no other priest but Christ can procure the acceptance of a sinful people upon his own account; nor be an effectual mediator for them to God, unless in subserviency to an effectual mediator who can procure us access and acceptance for his own sake. For all other priests are sinners as well as the people, and have as much need of a mediator for themselves. 1. See therefore that you never appear before God, but as sinners, that have offended him, and have deserved to be cast out of his favour for ever, and such as are in absolute necessity of a mediator to procure their access and acceptance with God: come not to God without the sense of sin and misery. 2. See also that you come as those that have a mediator in the presence of God; even Jesus our High Priest who appeareth before God continually to make intercession for us: come