John 13:7
What does John 13:7 mean?
Jesus answered him, “You don’t know what I am doing now, but you will understand later.”
The short answer
In John 13:7, Jesus is kneeling on the floor with a towel, washing his disciples' feet — the work of a household servant. Peter objects, and Jesus answers him with a promise instead of an explanation: "You don't know what I am doing now, but you will understand later." The verse names a gap that runs through the whole scene. Something decisive is happening, but its meaning is deliberately withheld. Peter cannot grasp it in the moment, and Jesus does not force him to.
What makes this verse remarkable is what the "later" understanding turns out to be. When Jesus finally explains himself a few verses on, he does not offer a theory. He gives a command: since your Lord and Teacher has washed your feet, "you also ought to wash one another's feet" (13:14). The church has long remembered this as the mandatum — the mandate behind the name Maundy Thursday. In other words, the understanding Jesus promises does not arrive as information. It arrives when the disciples pick up the towel themselves. You come to know what the footwashing means by doing it for someone else.
John adds one more quiet layer. In the previous chapter, Mary of Bethany anointed Jesus' feet and wiped them — and the Gospel uses the same rare verb for her wiping that it uses for Jesus' towel in chapter 13. Before Jesus ever taught the lesson, a woman had already enacted it. Peter, standing on his dignity, cannot yet understand; Mary, kneeling with her hair unbound, already does. John 13:7 is honest about how slowly most of us learn, but it also insists that understanding is possible — and that it comes through humble service rather than ahead of it.
What scholars say
These excerpts answer what the disciples were finally meant to understand: McKim shows that John's Gospel pairs the footwashing with a command — the mandatum behind "Maundy Thursday" — while Clark-Soles traces a rare verb linking Jesus' towel to Mary's anointing in the previous chapter, where a woman enacts the lesson before Jesus ever teaches it.
“The term “maundy” is from the Latin word mandatum , meaning “mandate” or “commandment.” In the Gospel of John there is no mention of the sharing of the bread and the wine in the meal of Jesus and his disciples. What John has instead is Jesus’ washing his disciples’ feet (John 13:5ff.) and giving them a command: “If I, your Lord and Teacher, have washed your feet, you also ought to wash one another’s feet” (John 13:14).”
“Mary’s act is also prophetic, however. First, as in the story in Mark, Jesus notes that this anointing woman understands that he is going to die and foreshadows it (John 12:7). Second, in the next chapter (John 13:1–15), Jesus wipes ( ekmassom ) the feet of the disciples with a towel and tells them to do the same for one another. The word ekmassom occurs only in these two events, which highlights the intentional direct connection. What Jesus overtly teaches the disciples to do in chapter 13 in tending to one another as church, Mary does before he ever mentions it.”
What it means for you
Most of us want to understand before we obey — to see the full picture before we kneel. John 13:7 suggests the order often runs the other way. Some things Jesus asks of us only make sense in hindsight, after we have done them: forgiving someone who hasn't earned it, serving without recognition, taking the lower place. If you are in a season where God's work in your life feels opaque, this verse gives you permission to not understand yet. And it offers a practical path forward: find someone whose feet, so to speak, need washing. Comprehension tends to follow the towel.
John 13 in context
John 13 opens the night before the crucifixion. Instead of narrating the bread and cup, John's Gospel shows Jesus washing his disciples' feet during supper — a shocking reversal of roles that prompts Peter's protest and Jesus' reply in verse 7. Jesus then explains the act as a pattern to imitate (13:14–15), predicts his betrayal by Judas, and gives the new commandment to love one another as he has loved them (13:34). Verse 7 sits at the hinge: the act has happened, but its meaning is still ahead.