"***** Have you tasted of the powers of the world to come? Have you been eating the flesh and drinking the blood of the Son of God? Then, although ministerial hands may not have been laid upon you in ordination, Christ has laid His hands upon you and has said: “Ye are My witnesses.” 6T 444.2"
"Then Jesus said unto them, Verily, verily, I say unto you, Except ye eat the flesh of the Son of man, and drink his blood, ye have no life in you."
The EGW passage directly references the concept of 'eating the flesh and drinking the blood of the Son of God,' which is a clear and explicit allusion to John 6:53.
"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."
The EGW passage connects the idea of being a witness for Christ with the idea of Christ laying His hands upon someone, which echoes the principle in Acts 1:8 where receiving power from the Holy Spirit empowers believers to be witnesses.