And hence, in Freemasonry, the same symbolism is communicated by the apron, which, because it is the first gift which the aspirant receives,--the first symbol in which he is instructed,--has been called the "badge of a mason." And most appropriately has it been so called; for, whatever may be the future advancement of the candidate in the "Royal Art," into whatever deeper arcana his devotion to the mystic institution or his thirst for knowledge may carry him, with the apron--his first investiture--he never parts. Changing, perhaps, its form and its decorations, and conveying at each step some new and beautiful allusion, its substance is still there, and it continues to claim the honorable title by which it was first made known to him on the night of his initiation. The apron derives its significance, as the symbol of purity, from two sources--from its color and from its material. In each of these points of view it is, then, to be considered, before its symbolism can be properly appreciated. And, first, the color of the apron must be an unspotted white. This color has, in all ages, been esteemed an emblem of innocence and purity. It was with reference to this symbolism that a portion of the vestments of the Jewish priesthood was directed to be made white. And hence Aaron was commanded, when he entered into the holy of holies to make an expiation for the sins of the people, to appear clothed in white linen, with his linen apron, or girdle, about his loins. It is worthy of remark that the Hebrew word LABAN, which signifies _to make white_, denotes also _to purify_; and hence we find, throughout the Scriptures, many allusions to that color as an emblem of purity. "Though thy sins be as scarlet," says Isaiah, "they shall be _white_ as snow;" and Jeremiah, in describing the once innocent condition of Zion, says, "Her Nazarites were purer than snow; they were _whiter_ than milk." In the Apocalypse a _white stone_ was the reward promised by the Spirit to those who overcame; and in the same mystical book the apostle is instructed to say, that fine linen, clean and _white_, is the righteousness of the saints. In the early ages of the Christian church a _white garment_ was always placed upon the catechumen who had been recently baptized, to denote that he had been cleansed from his former sins, and was thenceforth to lead a life of innocence and purity. Hence it was presented to him with this appropriate charge: "Receive the white and undefiled garment, and produce it unspotted before the tribunal of our Lord Jesus Christ, that you may obtain immortal life." The _white alb_ still constitutes a part of the vestments of the Roman church, and its color is said by Bishop England "to excite to piety by teaching us the purity of heart and body which we should possess in being present at the holy mysteries."