13 Ye are the salt of the earth; but if the salt have become insipid, wherewith shall it be salted? It is no longer fit for anything but to be cast out and to be trodden under foot by men.
14 Ye are the light of the world: a city situated on the top of a mountain cannot be hid. 15 Nor do [men] light a lamp and put it under the bushel, but upon the lamp-stand, and it shines for all who are in the house.
Matthew Henry's Commentary on Matthew 5:13-15
Commentary on Matthew 5:13-16
(Read Matthew 5:13-16)
Ye are the salt of the earth. Mankind, lying in ignorance and wickedness, were as a vast heap, ready to putrify; but Christ sent forth his disciples, by their lives and doctrines to season it with knowledge and grace. If they are not such as they should be, they are as salt that has lost its savour. If a man can take up the profession of Christ, and yet remain graceless, no other doctrine, no other means, can make him profitable. Our light must shine, by doing such good works as men may see. What is between God and our souls, must be kept to ourselves; but that which is of itself open to the sight of men, we must study to make suitable to our profession, and praiseworthy. We must aim at the glory of God.