Only remember the condition, 'By Me if any man enter in.' That is not a thing to be done once for all, but needs perpetual repetition. When we clasp anything in our hands, however tight the initial grasp, unless there is a continual effort of renewed tightening, the muscles become lax, and we have to renew the tension, if we are to keep the grasp. So in our Christian life it is only the continual repetition of the act which our Lord here calls 'entering in by Him' that will bring to us this continual exemption from, and immunity in, the dangers that beset us. Keep Christ between you and the storm. Keep on the lee side of the Rock of Ages. Keep behind the breakwater, for there is a wild sea running outside; and your little boat, undecked and with a feeble hand at the helm, will soon be swamped. Keep within the fold, for wolves and lions lie in every bush. Or, in plain English, live moment by moment in the realising of Christ's presence, power, and grace. So, and only so, shall you be safe. II. Now, secondly, note, in Jesus Christ any man may find a field for the unrestricted exercise of his activity. That metaphor of 'going in and out' is partly explained to us by the image of the flock, which passes into the fold for peaceful repose, and out again, without danger, for exercise and food; and is partly explained by the frequent use, in the Old Testament and in common conversation, of the expression 'going out and in' as the designation of the two-sided activity of human life. The one side is the contemplative life of interior union with God by faith and love; the other, the active life of practical obedience in the field of work which God provides for us. These two are both capable of being raised to their highest power, and of being discharged with the most unrestricted and joyous activity, on condition of our keeping close to Christ, and living by the faith of Him.