Passage
His sisters therefore sent to him, saying: Lord, behold, he whom thou lovest is sick.
John 11:3 (DRB)
Nearby Context
John 11:1 Now there was a certain man sick, named Lazarus, of Bethania, of the town of Mary and of Martha her sister.
John 11:2 (And Mary was she that anointed the Lord with ointment and wiped his feet with her hair: whose brother Lazarus was sick.)
John 11:3 His sisters therefore sent to him, saying: Lord, behold, he whom thou lovest is sick.
John 11:4 And Jesus hearing it, said to them: This sickness is not unto death, but for the glory of God: that the Son of God may be glorified by it.
John 11:5 Now Jesus loved Martha and her sister Mary and Lazarus.
Study Lenses
The verse centers on "sisters", "therefore", "sent", "saying", "lord", "behold", "thou", and "lovest". It is saying that the verse draws attention to "sisters" and "therefore", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 2's "And Mary was she that anointed the..." into verse 4's "And Jesus hearing it said to them...", so "sisters" and "therefore" 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 "sisters" and "therefore" with trust shaped by these words, not by a vague optimism outside the passage.