"Let the worker for Christ remember that he is not to labor in his own strength. Let him lay hold of the throne of God with faith in His power to save. Let him wrestle with God in prayer, and then work with all the facilities God has given him. The Holy Spirit is provided as his efficiency. Ministering angels will be by his side to impress hearts. COL 232.3"
"For we wrestle not against flesh and blood, but against principalities, against powers, against the rulers of the darkness of this world, against spiritual wickedness in high places."
Both passages use the imagery of wrestling, though EGW's passage focuses on wrestling with God in prayer, while Ephesians focuses on spiritual warfare. The connection is thematic, as both involve a struggle against opposing forces.
"If the leaders and teachers at Jerusalem had received the truth Christ brought, what a missionary center their city would have been! Backslidden Israel would have been converted. A vast army would have been gathered for the Lord. And how rapidly they could have carried the gospel to all parts of the world. So now, if men of influence and large capacity for usefulness could be won for Christ, then through them what a work could be accomplished in lifting up the fallen, gathering in the outcasts, and spreading far and wide the tidings of salvation. Rapidly the invitation might be given, and the guests be gathered for the Lord's table. COL 232.4"
"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 discuss the potential for spreading the gospel rapidly and widely. Acts 1:8 is a direct command to be witnesses, while EGW's passage discusses how influential people could accelerate this process. The connection is thematic, focusing on the expansion of the gospel.