Last night’s Morning and Evening by Spurgeon was particularly warm for those who struggle with assurance:
Sometimes we cannot see the light, but God always sees the light, and that is much better than our seeing it. Better for the judge to see my innocence than for me to think I see it. It is very comfortable for me to know that I am one of God’s people—but whether I know it or not, if the Lord knows it, I am still safe. This is the foundation, “The Lord knoweth them that are His.” You may be sighing and groaning because of inbred sin, and mourning over your darkness, yet the Lord sees “light” in your heart, for He has put it there, and all the cloudiness and gloom of your soul cannot conceal your light from His gracious eye. You may have sunk low in despondency, and even despair; but if your soul has any longing towards Christ, and if you are seeking to rest in His finished work, God sees the “light.” He not only sees it, but He also preserves it in you. “I, the Lord, do keep it.” This is a precious thought to those who, after anxious watching and guarding of themselves, feel their own powerlessness to do so. The light thus preserved by His grace, He will one day develop into the splendour of noonday, and the fulness of glory. The light within is the dawn of the eternal day.