Shared ground
John frames this scene as the opening of Jesus’ final-night teaching and actions at the meal. The narrator stresses Jesus’ awareness: he knows “his time” has arrived to leave this world and go to the Father, and he knows the Father has put “all things” into his hands (explicit in vv. 1, 3). The story also places betrayal in motion at the same moment (explicit in v. 2).
The footwashing is presented as deliberate and contrastive. Jesus’ high status (from God, returning to God; entrusted with “all things”) stands next to a low-status task normally done by a servant (explicit in vv. 3–5, supported by the cultural expectation noted in Stage A). The narrator interprets the act’s meaning ahead of time by describing it as an expression of love “to the end” for “his own” who are still “in the world” (explicit in v. 1).
Where interpretation differs
1) What “before the Passover” and “after supper” mean in the timeline. Some read the meal as the Passover meal itself, with “before the Passover” meaning before the festival period fully begins. Others take the wording more strictly and argue this meal occurs before the Passover meal, highlighting a difference between John’s sequencing and other Gospel accounts.
2) What “he loved them to the end” emphasizes. Some think it mainly means Jesus loved them all the way through the coming events (love that lasts to the finish). Others think it mainly means he loved them to the fullest extent (love shown in an extreme, costly way). Many readers think John intends both ideas at once.
3) How the devil’s prompting relates to Judas’ responsibility. The text says the devil has already put betrayal into Judas’ heart (v. 2), but it also presents Judas as the one who betrays. Some emphasize spiritual influence as the main driver; others emphasize Judas’ own intent and treat the devil’s role as intensifying what Judas chooses.
Why the disagreement exists
John uses brief time markers (“before Passover,” “during/after supper”) that can be read in more than one way when compared with other accounts of Jesus’ final meal. John also uses compact phrases (“to the end,” “all things”) that carry a range of meaning in ordinary language, and the narrative combines human action and spiritual influence without spelling out how they fit together.
What this passage clearly contributes
This opening makes several points before any explanation is given later. (1) Jesus’ coming departure and return to the Father is not an accident; it is known to him and set within a larger purpose (vv. 1, 3). (2) The footwashing begins as a chosen act by someone who holds “all things” in his hands, so humility is shown as strength under control rather than loss of control (vv. 3–5). (3) Love is the interpretive lens John gives for reading what follows in the farewell section (v. 1). (4) Betrayal is present in the room, yet Jesus still serves (v. 2, vv. 4–5).