"When brought in contact with the higher classes of society, let not the physician feel that he must conceal the peculiar characteristics which sanctification through the truth gives him. The physicians who unite with the work of God are to co-operate with God as His appointed instrumentalities; they are to give all their powers and efficiency to magnifying the work of God's commandment-keeping people. Those who in their human wisdom try to conceal the peculiar characteristics that distinguish God's people from the world will lose their spiritual life and will no longer be upheld by His power. 6T 250.3"
"Let your light so shine before men, that they may see your good works, and glorify your Father which is in heaven."
Both passages emphasize the importance of Christians living in a way that reflects their faith and glorifies God. EGW's statement about not concealing the characteristics of sanctification aligns with the idea of letting one's light shine.