_Ans._ There are three sorts of signs here to be distinguished. 1. Natural signs: so smoke is a sign of fire, and the dawning of the day a sign of the rising of the sun. 2. Customable signs; and so the uncovering of the head, which of old was a sign of preeminence, hath, through custom, become a sign of subjection. 3. Voluntary signs, which are called _signa instituta_; these are either sacred or civil. To appoint sacred signs of heavenly mysteries or spiritual graces is God’s own peculiar, and of this kind are the holy sacraments. Civil signs for civil and moral uses may be, and are, commendably appointed by men, both in church and commonwealth; and thus the tolling of a bell is a sign given for assembling, and hath the same signification both in ecclesiastical and secular assemblings. Now, besides the sacred signs of God’s own institution, we know that natural signs have also place in divine worship; thus kneeling in time of prayer signifieth the submission of our hearts and minds, the lifting up of our eyes and hands signifieth the elevation of our affections; the rending of the garments signified the rending of the heart by sorrow; standing with a religious suspect to that which is before us signifieth veneration or reverence; sitting at table signifieth familiarity and fellowship. “For which of you (saith our Master), Luke xvii. 7, having a servant ploughing, or feeding cattle, will say unto him by and by, when he is come from the field, Go and sit down to meat?” All these signs have their significations from nature. And if it be said that howbeit sitting at our common tables be a sign natural to signify familiarity amongst us, yet nature hath not given such a signification to sitting at the Lord’s table,—I answer, that sitting is a natural sign of familiarity, at what table soever it be used. At the heavenly table in the kingdom of glory, familiarity is expressed and signified by sitting: “Many shall come from the east and west, and shall sit down with Abraham,” &c., Matt. xviii. 11. Much more, then, at the spiritual table in the kingdom of grace. The difference betwixt other common tables and the Lord’s table can infer no more, but that with great humility we ought to address ourselves unto it; yet still we are to make use of our familiarity with Christ _ut tanquam in eodem toro accumbentes_, as saith Chrysostom.(808) Wherefore we do not there so look to Christ in his princely throne and glorious majesty, exalted far above all principalities and powers, as to forget that he is our loving and kind banqueter, who hath admitted us to that familiar fellowship with him which is signified by our sitting at his table. Secondly, Customable signs have likewise place in divine service; for so a man coming into one of our churches in time of public worship, if he see the hearers covered, he knows by this customable sign that sermon is begun.