The LORD is your keeper; the Lord is your shade on your right hand. The sun will not smite you by day, nor the moon by night. The Lord will protect you from all evil; He will keep your soul. (Psalm 121:5–7)

Cain’s angry retort to God reflected his contempt of Abel and his sacrifice. And God’s answer was that yes, he was in fact his brother’s keeper—at least at the horizontal level, human to human, sibling to sibling. That was implied in the time of Adam and Eve’s sons (Cain should have known), and it was explicitly stated in Jesus’ teaching much later: “You shall love your neighbor as yourself” (Matt 22:39).

But this harmonious, self-giving concern for others, being our “brother’s keeper,” goes against our self-centered nature as fallen sinners. That is God’s design—He commanded it—but it has been problematic since the days of Eden.

The good news is that God’s commands reflect His character. In this case, we are to be one another’s keepers because God is our ultimate keeper. According to the standard Hebrew lexicons, the word “keeper” used here means “one who keeps, watches, preserves us from injury, harm or danger.” Now God does not protect us from everything. Standing out in the summer sun too long can bring a sunburn. Faithful Christians do get into accidents. God-honoring Christians do sometimes experience abuse.

But note that “He will keep your soul,” using the same root word as “keeper.” No matter the external difficulties, God will keep our souls. This is not so much a statement of eternal security (although we believe that promise from the Lord is taught elsewhere in Scripture), but a statement of preservation of our soul’s wellbeing.

What do we mean by that? The apostle Paul put it this way: “Therefore we do not lose heart, but though our outer man is decaying, yet our inner man is being renewed day by day” (2 Cor 4:16). Despite our circumstances, whatever difficulty we encounter, no matter how long our trial lasts, we can maintain our spiritual equilibrium with the comforting truth that God is our Keeper. People will fail us, friends forsake us, but He will never leave nor forsake us (Heb 13:5). He is the Keeper who never fails.

When we are down, He picks us up. When we feel left out, He includes us. When we are discouraged, He encourages us through the ministering work of His Holy Spirit. When no human way out seems possible, He sustains us. “If God is for us, who is against us?” (Rom 8:31). In the midst of our trials, we can rest in God, for He is our Keeper.

Lord, my wonderful Keeper, I rest in You and will not be afraid.