men of such infirmities should take heed unto themselves and be careful in the feeding and nurture of their souls. . Take heed unto yourselves, because such great works as ours have greater temptations than many other men face. Smaller strength may serve for lighter works and burdens. But if you will venture on the great undertakings of the ministry; if you will lead on the troops of Christ against the face of Satan and his followers; if you will engage yourselves against principalities,