Mary vs Martha: Every Missionary's Battle

As activity increases and men become successful in doing any work for God, there is danger of trusting to human plans and methods. There is a tendency to pray less, and to have less faith. Like the disciples, we are in danger of losing sight of our dependence on God, and seeking to make a savior of our activity. We need to look constantly to Jesus, realizing that it is His power which does the work. While we are to labor earnestly for the salvation of the lost, we must also take time for meditation, for prayer, and for the study of the word of God. Only the work accomplished with much prayer, and sanctified by the merit of Christ, will in the end prove to have been efficient for good. - Desire of Ages,362