It is a serious reflection for the evangelist that wherever God's Spirit is at work, there Satan is sure to be busy. We must remember and ever be prepared for this. The enemy of Christ and the enemy of souls is always on the watch, always hovering about to see what he can do, either to hinder or corrupt the work of the gospel. This need not terrify or even discourage the workman; but it is well to bear it in mind and be watchful. Satan will leave no stone unturned to mar or hinder the blessed work of God's Spirit. He has proved himself the ceaseless, vigilant enemy of that work, from the days of Eden down to the present moment.