"Perilous times are before us. Every one who has a knowledge of the truth should awake, and place himself, body, soul, and spirit, under the discipline of God. The enemy is on our track. We must be wide awake, on our guard against him. We must put on the whole armor of God. We must follow the directions given through the Spirit of prophecy. We must love and obey the truth for this time. This will save us from accepting strong delusions. God has spoken to us through His word. He has spoken to us through the testimonies to the church, and through the books that have helped to make plain our present duty and the position we should now occupy. The warnings that have been given, line upon line, precept upon precept, should be heeded. If we disregard them, what excuse can we offer? GW 308.1"
"Put on the whole armour of God, that ye may be able to stand against the wiles of the devil."
The EGW passage directly quotes and applies Ephesians 6:11, urging readers to 'put on the whole armor of God.' This is a clear and explicit allusion.
"Therefore let us not sleep, as do others; but let us watch and be sober."
Both passages emphasize the need to be awake and watchful in light of impending danger. The EGW passage urges readers to 'awake' and be 'on our guard,' while 1 Thessalonians 5:6 encourages believers not to 'sleep' but to 'watch and be sober.'
"I beseech those who are laboring for God not to accept the spurious for the genuine. Let not human reasoning be placed where sanctifying truth should be. Christ is waiting to kindle faith and love in the hearts of His people. Let not erroneous theories receive countenance from the people who ought to be standing firm on the platform of eternal truth. God calls upon us to hold firmly to the fundamental principles that are based upon unquestionable authority. GW 308.2"
"Prove all things; hold fast that which is good."
Both passages encourage discernment and holding fast to what is true and good. The EGW passage warns against accepting 'spurious' ideas and urges readers to hold firmly to 'fundamental principles,' while 1 Thessalonians 5:21 instructs believers to 'prove all things; hold fast that which is good.' The connection reflects a shared principle.
"I marvel that ye are so soon removed from him that called you into the grace of Christ unto another gospel: Which is not another; but there be some that trouble you, and would pervert the gospel of Christ. But though we, or an angel from heaven, preach any other gospel unto you than that which we have preached unto you, let him be accursed. As we said before, so say I now again, If any man preach any other gospel unto you than that ye have received, let him be accursed."
Both passages warn against accepting false gospels or doctrines and emphasize adherence to the true gospel/fundamental principles.