What does Psalm 91:12 mean?

The prior verse indicated God would use His angels to protect those who believe in Him (Psalm 91:11). The terminology of this psalm is beautiful, and dramatic. However, it is not intended to be used as an obligation for God to keep anyone safe from harm, all the time, and in all circumstances. Satan tempted Jesus with these words, and that error (Matthew 4:5–6). Christ refuted that twisting of God's Word (Matthew 4:7; Deuteronomy 6:16).

Those who stay near to God (Psalm 91:1–2) and His wisdom (Proverbs 1:7) are far less likely to suffer the consequences of sin and evil (Proverbs 9:11–12). As other psalms indicate, hardship and struggle are still part of life (Psalm 3:1–2; 73:2–3). Difficulty in this life is to be expected (John 16:33). However, nothing can happen outside of God's will and His plan (Romans 8:28).