exodus 28:2 And thou shalt make holy garments for Aaron thy brother for glory and for beauty. - Free Bible Online

      2-5. holy garments--No inherent holiness belonged either to the material or the workmanship. But they are called "holy" simply because they were not worn on ordinary occasions, but assumed in the discharge of the sacred functions (Eze 44:19).
      for glory and for beauty--It was a grand and sumptuous attire. In material, elaborate embroidery, and color, it had an imposing splendor. The tabernacle being adapted to the infantine aid of the church, it was right and necessary that the priests' garments should be of such superb and dazzling appearance, that the people might be inspired with a due respect for the ministers as well as the rites of religion. But they had also a further meaning; for being all made of linen, they were symbolical of the truth, purity, and other qualities in Christ that rendered Him such a high priest as became us.

JFB.