John 13:21 (WEB)

Passage

When Jesus had said this, he was troubled in spirit, and testified, “Most certainly I tell you that one of you will betray me.”

Nearby Context

John 13:19 From now on, I tell you before it happens, that when it happens, you may believe that I am he.

John 13:20 Most certainly I tell you, he who receives whomever I send, receives me; and he who receives me, receives him who sent me.”

John 13:21 When Jesus had said this, he was troubled in spirit, and testified, “Most certainly I tell you that one of you will betray me.”

John 13:22 The disciples looked at one another, perplexed about whom he spoke.

John 13:23 One of his disciples, whom Jesus loved, was at the table, leaning against Jesus’ breast.

Study Lenses

The verse centers on "Spirit", "jesus", "said", "troubled", "testified", "most", "certainly", and "tell". It is saying that the verse draws attention to "Spirit" and "jesus", so its meaning should be read from those terms before moving to application.

The nearby context moves from verse 20's "Most certainly I tell you he who..." into verse 22's "The disciples looked at one another perplexed...", so "Spirit" and "jesus" 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 "Spirit" and "jesus" with trust shaped by these words, not by a vague optimism outside the passage.