John Chrysostom
Catena Aurea · Johannesevangelium 12
The people answered him, We have heard out of the law that Christ abideth for ever: and how sayest thou, The Son of man must be lifted up? who is this Son of man? Then Jesus said unto them, Yet a little while is the light with you. Walk while ye have the light, lest darkness come upon you: for he that walketh in darkness knoweth not whither he goeth. While ye have light, believe in the light, that ye may be the children of light. These things spake Jesus, and departed, and did hide himself from them. For he that walketh in darkness, knoweth not whither he goeth.
(Hom. lxviii. 1) What things do the Jews now, and know not what they do; thinking, like men in the dark, that they are going the right road, while they are taking directly the wrong one. Wherefore He adds, While ye have the light, believe in the light.