But the strength and durability of the corner-stone are also eminently suggestive of symbolic ideas. To fulfil its design as the foundation and support of the massive building whose erection it precedes, it should be constructed of a material which may outlast all other parts of the edifice, so that when that "eternal ocean whose waves are years" shall have ingulfed all who were present at the construction of the building in the vast vortex of its ever-flowing current; and when generation after generation shall have passed away, and the crumbling stones of the ruined edifice shall begin to attest the power of time and the evanescent nature of all human undertakings, the corner-stone will still remain to tell, by its inscriptions, and its form, and its beauty, to every passer-by, that there once existed in that, perhaps then desolate, spot, a building consecrated to some noble or some sacred purpose by the zeal and liberality of men who now no longer live. So, too, do this permanence and durability of the corner-stone, in contrast with the decay and ruin of the building in whose foundations it was placed, remind the mason that when this earthly house of his tabernacle shall have passed away, he has within him a sure foundation of eternal life--a corner-stone of immortality--an emanation from that Divine Spirit which pervades all nature, and which, therefore, must survive the tomb, and rise, triumphant and eternal, above the decaying dust of death and the grave.[118] It is in this way that the student of masonic symbolism is reminded by the corner-stone--by its form, its position, and its permanence--of significant doctrines of duty, and virtue, and religious truth, which it is the great object of Masonry to teach. But I have said that the material corner-stone is deposited in its appropriate place with solemn rites and ceremonies, for which the order has established a peculiar ritual. These, too, have a beautiful and significant symbolism, the investigation of which will next attract our attention. And here it may be observed, in passing, that the accompaniment of such an act of consecration to a particular purpose, with solemn rites and ceremonies, claims our respect, from the prestige that it has of all antiquity. A learned writer on symbolism makes, on this subject, the following judicious remarks, which may be quoted as a sufficient defence of our masonic ceremonies:--