Passage
Greater love has no one than this, that someone lay down his life for his friends.
John 15:13 (WEB)
Nearby Context
John 15:11 I have spoken these things to you, that my joy may remain in you, and that your joy may be made full.
John 15:12 “This is my commandment, that you love one another, even as I have loved you.
John 15:13 Greater love has no one than this, that someone lay down his life for his friends.
John 15:14 You are my friends, if you do whatever I command you.
John 15:15 No longer do I call you servants, for the servant doesn’t know what his lord does. But I have called you friends, for everything that I heard from my Father, I have made known to you.
Study Lenses
The verse centers on "greater", "love", "than", "someone", "down", "life", and "friends". It is saying that the verse draws attention to "greater" and "love", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 12's "This is my commandment that you love..." into verse 14's "You are my friends if you do...", so "greater" and "love" 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 "greater" and "love" with trust shaped by these words, not by a vague optimism outside the passage.