Calvin commentary 1Peter 5:7
7 Casting all our care
He more fully sets forth here the providence of God. For whence are these proverbial sayings, “We shall have to howl among wolves,” and, “They are foolish who are like sheep, exposing themselves to wolves to be devoured,” except that we think that by our humility we set loose the reins to the audacity of the ungodly, so that they insult us more wantonly? But this fear arises from our ignorance of divine providence. Now, on the other hand, as soon as we are convinced that God cares for us, our minds are easily led to patience and humility. Lest, then, the wickedness of men should tempt us to a fierceness of mind, the Apostle prescribes to us a remedy, and also David does in Psa_37:5, so that having cast our care on God, we may calmly rest. For all those who recumb not on God’s providence must necessarily be in constant turmoil and violently assail others. We ought the more to dwell on this thought, that God cares for us, in order, first, that we may have peace within; and, secondly, that we may be humble and meek towards men.
But we are not thus bidden to cast all our care on God, as though God wished us to have strong hearts, and to be void of all feeling; but lest fear or anxiety should drive us to impatience. In like manner, the knowledge of divine providence does not free men from every care, that they may securely indulge themselves; for it ought not to encourage the torpidity of the flesh, but to bring rest to faith.