"Glorious is the triumph awaiting the faithful. The apostle, realizing the possibilities before the Corinthian believers, sought to set before them that which uplifts from the selfish and the sensual, and glorifies life with the hope of immortality. Earnestly he exhorted them to be true to their high calling in Christ. “My beloved brethren,” he pleaded, “be ye steadfast, unmovable, always abounding in the work of the Lord, forasmuch as ye know that your labor is not in vain in the Lord.” AA 321.1"
"Therefore, my beloved brethren, be ye stedfast, unmoveable, always abounding in the work of the Lord, forasmuch as ye know that your labour is not in vain in the Lord."
EGW directly quotes 1 Corinthians 15:58.
"And let us not be weary in well doing: for in due season we shall reap, if we faint not."
Both passages discuss perseverance in doing good and not growing weary. While not a direct quote, the theme aligns.
"Thus the apostle, in the most decided and impressive manner, endeavored to correct the false and dangerous ideas and practices that were prevailing in the Corinthian church. He spoke plainly, yet in love for their souls. In his warnings and reproofs, light from the throne of God was shining upon them, to reveal the hidden sins that were defiling their lives. How would it be received? AA 321.2"
"Preach the word; be instant in season, out of season; reprove, rebuke, exhort with all longsuffering and doctrine."
Both passages discuss the need to reprove and correct, even when it is difficult. The EGW passage describes Paul's actions, while the Bible verse is an instruction.
"But speaking the truth in love, may grow up into him in all things, which is the head, even Christ:"
Both passages emphasize speaking truth in love, even when delivering reproof or correction.
After the letter had been dispatched, Paul feared lest that which he had written might wound too deeply those whom he desired to benefit. He keenly dreaded a further alienation and sometimes longed to recall his words. Those who, like the apostle, have felt a responsibility for beloved churches or institutions, can best appreciate his depression of spirit and self-accusing. The servants of God who bear the burden of His work for this time know something of the same experience of labor, conflict, and anxious care that fell to the lot of the great apostle. Burdened by divisions in the church, meeting with ingratitude and betrayal from some to whom he looked for sympathy and support, realizing the peril of the churches that harbored iniquity, compelled to bear a close, searching testimony in reproof of sin, he was at the same time weighed down with fear that he might have dealt with too great severity. With trembling anxiety he waited to receive some tidings as to the reception of his mes…
"For out of much affliction and anguish of heart I wrote unto you with many tears; not that ye should be grieved, but that ye might know the love which I have more abundantly unto you."
Both passages describe Paul's anguish and concern over the impact of his letters and reproofs on the Corinthian church. The EGW passage elaborates on the emotional burden Paul carried, which is reflected in 2 Corinthians 2:4.
"Who comforteth us in all our tribulation, that we may be able to comfort them which are in any trouble, by the comfort wherewith we ourselves are comforted of God."
The EGW passage echoes the sentiment of Paul's anxiety and concern for the Corinthians, which is related to the comfort and tribulation mentioned in 2 Corinthians 1:4. The verse speaks of God comforting us in tribulation so we can comfort others, and Paul's anxiety in the EGW passage is a form of tribulation. The connection is thematic, not a direct quote or explicit allusion.