"When errors come into our ranks, we are not to enter into controversy over them. We are faithfully to give the message of reproof, and then we are to lead the minds of the people away from fanciful, erroneous ideas, presenting the truth in contrast with error. The presentation of heavenly themes will open up to the mind principles that rest upon a foundation as enduring as eternity. 8T 192.2"
"Holding fast the faithful word as he hath been taught, that he may be able by sound doctrine both to exhort and to convince the gainsayers."
Both passages deal with upholding sound doctrine and refuting error, although the EGW passage focuses more on avoiding controversy and presenting truth, while Titus 1:9 focuses on convincing gainsayers. The principle of holding fast to sound doctrine is present in both.
"Those believers whose Christian convictions are consistent and firm, whose characters are of solid worth, are of great service to the Master. Nothing can move them from the faith. Truth is to them a precious treasure. 8T 192.3"
"Stand therefore, having your loins girt about with truth, and having on the breastplate of righteousness;"
Both passages emphasize the importance of truth and steadfastness in faith. Ephesians 6:14 uses the metaphor of being 'girt about with truth,' while the EGW passage speaks of believers whose 'Christian convictions are consistent and firm' and for whom 'truth is a precious treasure.'