"The ministry is no place for idlers. God's servants are to make full proof of their ministry. They will not be sluggards, but as expositors of His word they will put forth their utmost energies to be faithful. They should never cease to be learners. They are to keep their own souls alive to the sacredness of the work and to the great responsibilities of their calling, that they may at no time or place bring to God a maimed sacrifice, an offering which has cost them neither study nor prayer. The Lord has need of men of intense spiritual life. Every worker may receive an endowment of strength from on high, and may go forward with faith and hope in the path where God bids him walk. The word of God abides in the young, consecrated laborer. He is quick, earnest, powerful, having in the counsel of God an unfailing source of supply. 6T 412.1"
"But watch thou in all things, endure afflictions, do the work of an evangelist, make full proof of thy ministry."
The phrase 'make full proof of thy ministry' is directly quoted in 2 Timothy 4:5 and is used in the EGW passage. The surrounding context in EGW also aligns with the idea of diligence and faithfulness in ministry.
"And if ye offer the blind for sacrifice, is it not evil? and if ye offer the lame and sick, is it not evil? offer it now unto thy governor; will he be pleased with thee, or accept thy person? saith the Lord of hosts."
The EGW passage speaks against bringing 'a maimed sacrifice, an offering which has cost them neither study nor prayer,' which is a clear parallel to Malachi 1:8's condemnation of offering blind, lame, or sick animals as sacrifices. Both passages emphasize the importance of offering one's best to God.
"God has called this people to give to the world the message of Christ's soon coming. We are to give to men the last call to the gospel feast, the last invitation to the marriage supper of the Lamb. Thousands of places that have not heard the call are yet to hear it. Many who have not given the message are yet to proclaim it. Again I appeal to our young men: Has not God called upon you to sound this message? 6T 412.2"
"And sent forth his servants to call them that were bidden to the wedding: and they would not come."
The EGW passage explicitly refers to 'the last call to the gospel feast, the last invitation to the marriage supper of the Lamb,' which is a direct allusion to the parable in Matthew 22, where servants are sent to call people to the wedding feast.
"And I saw another angel fly in the midst of heaven, having the everlasting gospel to preach unto them that dwell on the earth, and to every nation, and kindred, and tongue, and people,"
Both passages discuss the proclamation of a message to the world. Revelation 14:6 speaks of an angel preaching the everlasting gospel to every nation, while the EGW passage discusses giving the message of Christ's soon coming to the world. The idea of a universal message is the key parallel.