"I have said all these things to you so that you may be kept from stumbling.

But Jesus knowing in himself that his disciples murmured at this, said to them, "Does this cause you to stumble?

Jesus answered, "Are there not twelve hours of daylight ? If a man walks in the day, he does not stumble, because he sees the light of this world.

But if a man walks in the night, he stumbles, because the light is not in him."