Passage
and if any one may walk in the night, he stumbleth, because the light is not in him.'
and if any one may walk in the night, he stumbleth, because the light is not in him.'
John 11:8 the disciples say to him, `Rabbi, now were the Jews seeking to stone thee, and again thou dost go thither!'
John 11:9 Jesus answered, `Are there not twelve hours in the day? if any one may walk in the day, he doth not stumble, because the light of this world he doth see;
John 11:10 and if any one may walk in the night, he stumbleth, because the light is not in him.'
John 11:11 These things he said, and after this he saith to them, `Lazarus our friend hath fallen asleep, but I go on that I may awake him;'
John 11:12 therefore said his disciples, `Sir, if he hath fallen asleep, he will be saved;'
The verse centers on "light", "walk", "night", and "stumbleth". It is saying that the verse draws attention to "light" and "walk", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 9's "Jesus answered Are there not twelve hours..." into verse 11's "These things he said and after this...", so "light" and "walk" belong inside that flow. In John context, the local focus is the identity of Jesus, new birth, eternal life, and belief and unbelief.
A plain takeaway is to answer the verse's own emphasis on "light" and "walk" with trust shaped by these words, not by a vague optimism outside the passage.