Spurgeon on sanctification

Thus I have reminded you that the prayer for sanctification is offered to the divine Father, and this leads us to look out of ourselves and wholly, to our God. Do not set about the work of sanctification yourselves, as if you could perform it alone. Do not imagine that holiness will necessarily follow because you listen to an earnest preacher, or unite in sacred worship. My brethren, God himself must work within you; the Holy Ghost must inhabit you; and this can only come to you by faith in the Lord Jesus. Believe in him for your sanctification, even as you have believed for your pardon and justification. He alone can bestow sanctification upon you; for this is the gift of God through Jesus Christ our Lord.