"The health reform is a branch of the special work of God for the benefit of His people. I saw that in an institution established among us the greatest danger would be of its managers’ departing from the spirit of the present truth and from that simplicity which should ever characterize the disciples of Christ . A warning was given me against lowering the standard of truth in any way in such an institution in order to help the feelings of unbelievers and thus secure their patronage. The great object of receiving unbelievers into the institution is to lead them to embrace the truth. If the standard be lowered, they will get the impression that the truth is of little importance, and they will go away in a state of mind harder of access than before. 1T 560.1"
"Let your light so shine before men, that they may see your good works, and glorify your Father which is in heaven."
The EGW passage discusses maintaining a high standard of truth so that unbelievers may be led to embrace it, which directly parallels the idea of letting one's light shine so that others may see good works and glorify God. The purpose of both is to influence others positively through consistent adherence to a standard.
"Behold, I send you forth as sheep in the midst of wolves: be ye therefore wise as serpents, and harmless as doves."
The EGW passage warns against compromising truth to gain favor, suggesting a need for wisdom and discernment in dealing with unbelievers. This echoes the sentiment of being 'wise as serpents, and harmless as doves' when interacting with those who may be hostile or deceptive.