"It is God's design that such workers shall be freed from unnecessary anxiety, that they may have full opportunity to obey the injunction of Paul to Timothy, “Meditate upon these things; give thyself wholly to them.” 1 Timothy 4:15 . While they should be careful to exercise sufficiently to keep mind and body vigorous, yet it is not God's plan that they should be compelled to spend a large part of their time at secular employment. AA 356.1"
"Meditate upon these things; give thyself wholly to them; that thy profiting may appear to all."
Ellen White directly references 1 Timothy 4:15 in this passage.