I do not pray for these alone, but also for those who will believe in Me through their word; that they all may be one, as You, Father, are in Me, and I in You; that they also may be one in Us, that the world may believe that You sent Me (John 17:20-21, NKJV).
Whatever else we do in the work for souls, whatever outreach programs we create, we are to earnestly pray for those whom we are seeking to reach. This is central to what it means to be a Christian, even more so a disciple-maker. What powerful changes might occur if constant, fervent prayer was central to our methodology in seeking to make and keep disciples!
Let the workers grasp the promises of God, saying, -Ellen G. White, Medical Ministry, pp. 244, 245.
Thou hast promised, Ask, and ye shall receive.
I must have this soul converted to Jesus Christ. Solicit prayer for the souls for whom you labor; present them before the church as objects for the supplication. . . . Select another and still another soul, daily seeking guidance from God, laying everything before Him in earnest prayer, and working in divine wisdom.