Thus it is in every case. We must have authority before we can act in anything. Without this, the greater our zeal, energy, and apparent devotedness, the more fatal will be our mistake, and the more mischief we shall do to ourselves, to others, and to the cause of Christ. It is of the very last possible importance in every case, but especially where there is a measure of zeal, earnestness, and energy, that there should be sober subjection to the authority of the Word. If there be not this, there is no calculating the amount of mischief which may be done. If our devotedness flow not in the channel of simple obedience, if it rush over the embankments formed by the word of God, the consequences must be most disastrous. But there is another thing which stands next in importance to the authority of the _divine Word_, and that is the abiding realization of the _divine presence_. These two things must never be separated if we want to walk on the water. We may be quite clear and settled in our own minds, having distinct authority for any given line of action; but if we have not with equal distinctness the sense of the Lord's presence with us--if our eyes are not continually on the living God--we shall most assuredly break down. This is very serious, and demands the gravest consideration of the Christian reader. It was precisely here that Peter failed. He did not fail in obedience, but in realized dependence. He acted on the word of Jesus in leaving the ship, but he failed to lean on the arm of Jesus in walking on the water; hence his terror and confusion. Mere authority is not enough; we want power. To act without authority is wrong. To act without power is impossible. The authority for starting is the word. The power to proceed is the divine presence. The combination of the two must ever yield a successful career. It matters not in the smallest degree what the difficulties are if we have the stable authority of Holy Scripture for our course, and the blessed support of the presence of God in pursuing it. When God speaks, we must obey; but in order to do so, we must lean on His arm. "Have not I commanded you?" "Lo, I am with you." Here are the two things so absolutely essential to every child of God and every servant of Christ. Without these, we can do nothing; with them, we can do all things. If we have not a "Thus saith the Lord," or "It is written," we cannot enter upon a path of devotedness; and if we have not His realized presence, we cannot pursue it. It is quite possible to be right in setting out, and yet to fail in going on.