"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. GW 64.1"
"But watch thou in all things, endure afflictions, do the work of an evangelist, make full proof of thy ministry."
The EGW passage directly echoes the sentiment of making 'full proof of thy ministry' and expands on what that entails.
"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."
Both passages address the idea of offering something less than one's best to God. EGW uses the metaphor of a 'maimed sacrifice' in the context of ministry, while Malachi speaks of literal flawed sacrifices.
"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. GW 64.2"
"But ye shall receive power, after that the Holy Ghost is come upon you: and ye shall be witnesses unto me both in Jerusalem, and in all Judea, and in Samaria, and unto the uttermost part of the earth."
Both passages emphasize the importance of receiving strength/power from God to fulfill one's calling. The EGW passage speaks of an 'endowment of strength from on high,' while Acts 1:8 speaks of receiving 'power' through the Holy Spirit.