John 12:35-36

Jesus said to them: "For a little while yet the light is among you. Walk while you have the light that the darkness may not overtake you. He who walks in the darkness does not know where he is going. While you have the light, believe in the light, that you may become the sons of the light."

There is in this passage the implicit promise and the implicit threat which are never very far from the heart of the Christian faith.

(i) There is the promise of light. The man who walks with Jesus is delivered from the shadows. There are certain shadows which cast their shade sooner or later on every light. There is the shadow of fear. Sometimes we are afraid to look forward. Sometimes, especially when we see what they can do to others, we are afraid of the chances and the changes of life. There are the shadows of doubts and uncertainties. Sometimes the way ahead is far from being clear and we feel like people groping among the shadows with nothing firm to cling to. There are the shadows of sorrow. Sooner or later the sun sets at midday and the lights go out. But the man who walks with Jesus is delivered from fear; he is liberated from doubt; he has a joy that no man takes from him.

(ii) There is the implicit threat. The decision to trust life and all things to Jesus, the decision to take him as Master and Guide and Saviour, must be made in time. In life all things must be done in time, or they will not be done at all. There is work which we can do only when we have the physical strength to do it. There is study which can be carried out only when our minds are keen enough and our memories retentive enough to cope with it. There are things which have to be said and done or the time for saying and doing them is gone for ever. It is so with Jesus. At the actual moment Jesus said this, he was appealing to the Jews to believe in him before the Cross came and he was taken from them. But this is an eternal truth. It is a statistical fact that there is a steep rise in the number of conversions up to the age of seventeen and an equally steep fall afterwards. The more a man lets himself become fixed in his ways the harder it is to jerk himself out of them. In Christ the supreme blessedness is offered to men; in one sense it is never too late to grasp it; but nonetheless it remains true that it must be grasped in time.

BLIND UNBELIEF (John 12:37-41)