William Burkitt on Luke 12:6

Observe here, 1. The doctrine which our Saviour preaches to his disciples: and that is, the doctrine of the divine providence, which concerns itself for the meanest of creatures. Even the birds of the air, and the hairs of our heads, do fall within the compass of God's protecting care.

Observe, 2. The use which our Saviour makes of this doctrine: namely, to fortify his disciples' spirits against all distrustful fears, and distracting cares.

Learn hence, 1. That the consideration of the divine care, and gracious providence of God over us and ours, ought to antidote our spirits against all distrustful fears whatsoever. If an hair from the head falls not to the ground without a providence, much less shall the head itself. If the very excrements of the body (such are the hairs) be taken care of by God, surely the more noble parts of the body, but especially the noblest part of ourselves, our soul, shall fall under his peculiar regard.