The Lord is the Protector of His people. He guards their lives from all evil influences. He protects them when they go outdoors and when they return indoors, namely, always. Moreover He will provide this protection forever. [source][source][source]
"Did believers never suffer from sunstroke or fall into the hands of bandits? It is apparent that while the psalm speaks of such blanket protection, the pilgrim must understand that everything that invades his or her life is under God"s watchful care and providence. The spirit of the psalm is to evoke trust in Yahweh, the Keeper of the pilgrim, and the Keeper of Israel, the Maker of heaven and earth. Often things that happen in the life of the pilgrim would not be his or her choice. But the psalm is not pointing in this direction. The direction is upward, toward God. The believer must recognize that life is a gift from God, the Giver of life. The pilgrim can rest confidently, knowing that God"s glory will prevail, and that justice ... and righteousness ... will ultimately rule." [1][source]
This psalm is a comforting reminder of God"s continual protection from harm and danger of all kinds. It is especially appropriate for travelers to remind themselves of His watch-care. [source][source][source]
"In spite of the perils of one"s pilgrimage, the believer can exercise trust in the Lord. God is neither too great to care, nor are God"s people too insignificant to be noticed. This quiet psalm reflects on God who quells the anxiety of the pilgrim"s heart, who watches over him or her with a shepherd"s gentleness and a guardian"s vigilance, and who gives thoughtful benediction to one"s daily routines." [2][source]