Matthew 5:14

“Ye are the light of the world, etc.] What the luminaries, the sun and moon, are in the heavens, with respect to corporal light, that the apostles were in the world with regard to spiritual light; carrying and spreading the light of the Gospel not only in Judea, but all over the world, which was in great darkness of ignorance and error; and through a divine blessing attending their ministry, many were turned from the darkness of Judaism and Gentilism, of sin and infidelity, to the marvellous light of divine grace. The Jews were wont to say, that of the Israelites in general, and particularly of their sanhedrim, and of their learned doctors, what Christ more truly applies here to his apostles;…”

“Ye are the light of the world--This being the distinctive title which our Lord appropriates to Himself (Joh 8:12; Joh 9:5; and see Joh 1:4, Joh 1:9; Joh 3:19; Joh 12:35-36) --a title expressly said to be unsuitable even to the highest of all the prophets (Joh 1:8) --it must be applied here by our Lord to His disciples only as they shine with His light upon the world, in virtue of His Spirit dwelling in them, and the same mind being in them which was also in Christ Jesus. Nor are Christians anywhere else so called. Nay, as if to avoid the august title which the Master has appropriated to Himself, Christians are said to "shine"--not as "lights," as our translators render it, but--"as…”

“The light of the world - The light of the world often denotes the sun, John 11:9. The sun renders objects visible, shows their form, their nature, their beauties, their deformities. The term light is often applied to religious teachers. See Matthew 4:16; Luke 2:32; John 1:4; John 8:12; Isaiah 49:6. It is pre-eminently applied to Jesus in these places, because he is, in the moral world, what the sun is in the natural world. The apostles, Christian ministers, and all Christians, are lights of the world, because they, by their instructions and example, show what God requires, what is the condition of man, what is the way of duty, peace, and happiness the way that leads to heaven. A city that is…”

“Ye are the light of the world - If ye are thus holy, you can no more be hid than the sun in the firmament: no more than a city on a mountain - Probably pointing to that on the brow of the opposite hill. Matthew 5:15”

“5:14 light of the world . . . city on a hilltop: The attractive quality of the disciples’ lives will draw other people to live similarly and to glorify God (see Isa 2:2-5; 42:6; 49:6; 51:4; 56:6-8; 60:1-3; Phil 2:15).”

“the light: Pro 4:18; Joh 5:35, Joh 12:36; Rom 2:19, Rom 2:20; Co2 6:14; Eph 5:8-14; Phi 2:15; Th1 5:5; Rev 1:20, Rev 2:1 a city: Gen 11:4-8; Rev 21:14-27 Matthew 5:15”