He made the pillars thereof of silver…the covering of it of purple… – Song of Songs 3:10

As for the silver pillars which bear up the canopy, to what should I liken them but to the attributes of God which support and guarantee the efficiency of the great atonement of Christ beneath which we are sheltered. There is the silver pillar of God’s justice. He cannot, He will not smite the soul that hides beneath the cross of Christ. If Christ hath paid the debt, how is it possible that God should visit again a second time the iniquity of His people, first on their Surety, and then again on themselves? Then stands the next, the solid pillar of His power. “They shall never perish, neither shall any pluck them out of My hand; My Father which gave them Me is greater than all, and none is able to pluck them out of My Father’s hand.” Then on the other side is the pillar of His love, a silver pillar indeed, bright and sparkling to the eye; love unchanging and eternal, strong as the power and fast as the justice which bear up the canopy on the other side. And here on this side stands immutability, another column upon which the atonement rests. If God could change, then might He cast away His blood-bought; but “because I am God and change not, therefore ye sons of Jacob rejoice.” As for the covering of the chariot, it is of purple. I need not tell you where it was dyed. No Tyrian hues are mingled here. Look up, Christian, and delight thyself in that blood-red canopy which shelters thee from the sun by day and from the moon by night! From hell and heaven, from time and from eternity, art thou secured by this covering which is of purple. Oh! tempting theme to dilate upon the precious and glorious doctrine of atonement! Whenever our adversaries assail the Church, whatever may be the apparent object of their animosity, their real one is always the same, a desperate hatred to the great truth that God was in Christ reconciling the world unto Himself, not imputing their trespasses unto them. Well, as they hate it, let us love it; and under it let us take our greatest delight. ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/0482.cfm