"dwelling in the heart it is impossible to conceal the light of His presence, or for that light to grow dim. On the contrary, it will grow brighter and brighter as day by day the mists of selfishness and sin that envelop the soul are dispelled by the bright beams of the Sun of Righteousness. PP 134.1"
"Let your light so shine before men, that they may see your good works, and glorify your Father which is in heaven."
Both passages discuss the idea of inner light shining outwards. EGW's reference to the 'Sun of Righteousness' further strengthens the connection to the concept of reflecting God's light, as described in Matthew 5:16.
"The people of God are His representatives upon the earth, and He intends that they shall be lights in the moral darkness of this world. Scattered all over the country, in the towns, cities, and villages, they are God's witnesses, the channels through which He will communicate to an unbelieving world the knowledge of His will and the wonders of His grace. It is His plan that all who are partakers of the great salvation shall be missionaries for Him. The piety of the Christian constitutes the standard by which worldlings judge the gospel. Trials patiently borne, blessings gratefully received, meekness, kindness, mercy, and love, habitually exhibited, are the lights that shine forth in the character before the world, revealing the contrast with the darkness that comes of the selfishness of the natural heart. PP 134.2"
"Ye are the light of the world. A city that is set on an hill cannot be hid."
EGW directly references the concept of being 'lights' in the world, echoing the language and meaning of Matthew 5:14.
"Ye are our epistle written in our hearts, known and read of all men: Forasmuch as ye are manifestly declared to be the epistle of Christ ministered by us, written not with ink, but with the Spirit of the living God; not in tables of stone, but in fleshy tables of the heart."
Both passages discuss believers as representatives or epistles of God, communicating His message to the world. While not a direct quote, the thematic overlap is significant.