"The physician who is truly converted will not gather to himself responsibilities that interfere with his work for souls. Since without Christ we can do nothing, how can a physician or a medical missionary engage successfully in his important work without earnestly seeking the Lord in prayer? Prayer and a study of the word bring life and health to the soul. 6T 253.1"
"I am the vine, ye are the branches: He that abideth in me, and I in him, the same bringeth forth much fruit: for without me ye can do nothing."
EGW directly echoes the sentiment of John 15:5, emphasizing dependence on God for success. The phrase 'without Christ we can do nothing' is directly reflected in EGW's statement 'Since without Christ we can do nothing'.
"Pray without ceasing."
EGW emphasizes the importance of prayer for physicians and medical missionaries. This aligns with the principle of 'pray without ceasing' found in 1 Thessalonians 5:17.