The peace, which a true Christian enjoys with God and his conscience, has a solid ground-word to rest upon. It is not built upon a pleasing fiction of his imagination, a delusive dream of his ignorance; it is founded upon a rock, and though the rains descend, and the winds blow, and the floods beat upon that house, it shall not fall.
27 Peace I leave with you; My peace I give to you; not as the world gives do I give to you. Do not let your heart be troubled, nor let it be fearful.
16 Now may the Lord of peace Himself continually grant you peace in every circumstance. The Lord be with you all!
When a man hath faith in the blood of Christ there is but little wonder that he hath peace, for indeed he is fully warranted in enjoying the most profound calm which mortal heart can know. God hath said, “He that believeth is justified from all things.” and, moreover, that “he that believeth on the Lord Jesus Christ shall be saved.” The necessary consequence of that is, that he possesses peace of mind. If God has punished Christ in my stead, he will not punish me again. How, I ask, can the man tremble who believes himself forgiven? It were strange indeed if his faith did not breathe a holy calm into his bosom.
Taken from a sermon by C. H. Spurgeon, “Spiritual Peace”