When God Doesn't Remove Our Afflictions

Matthew Henry wrote this:

Men do not notice the mercies they enjoy in and under their
afflictions, nor are thankful for them, therefore they cannot expect that God should deliver them out of affliction. He gives songs in the night; when our condition is dark and melancholy, there is that in God’s providence and promise, which is sufficient to support us, and to enable us even to rejoice in tribulation. When we only pore upon our afflictions, and neglect the consolations of God which are treasured up for us, it is just in God to reject our prayers. Even the things that will kill the body, cannot hurt the soul. If we cry to God for the removal of an affliction, and it is not removed, the reason is, not because the Lord’s hand is shortened, or his ear heavy; but because we are not sufficiently humbled.