To the end He may stablish your hearts unblameable in holiness before God, even our Father, at the coming of our Lord Jesus Christ with all His saints. -1 Thessalonians 3:13

There are two kinds of perfection which a Christian needs: one is the perfection of justification in the person of Jesus; and the other is, the perfection of sanctification worked in him by the Holy Spirit. At present corruption still rests even in the breasts of the regenerate. At present the heart is partially impure. At present there are still lusts and evil imaginations. But, oh! My soul rejoices to know that the day is coming when God shall finish the work which He has begun; and He shall present my soul, not only perfect in Christ, but perfect in the Spirit, without spot or blemish, or any such thing. And is it true that this poor depraved heart is to become as holy as that of God? And is it true that this poor spirit, which often cries, “O, wretched man that I am, who shall deliver me from the body of this sin and death!” shall get rid of sin and death? I shall have no evil things to vex my ears, and no unholy thoughts to disturb my peace. Oh, happy hour! May it be hastened! Just before I die sanctification will be finished; but not till that moment shall I ever claim perfection in myself. But at that moment when I depart, my spirit shall have its last baptism in the Holy Spirit’s fire. It shall be put in the crucible for its last trying in the furnace; and then, free from all dross, and fine, like a wedge of pure gold, it shall be presented at the feet of God without the least degree of dross or mixture. O glorious hour! O blessed moment! Methinks I long to die if there were no heaven, if I might but have that last purification come up from Jordan’s stream most white from the washing. Oh! To be washed white, clean, pure, perfect! Not an angel more pure than I shall be- yea, not God Himself more holy! And I shall be able to say, in a double sense, “Great God, through Jesus’ blood, I am clean, through the Spirit’s work, I am clean too!” Must you not extol the power of the Holy Ghost in thus making us fit to stand before our Father in heaven? ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/0030.cfm