John 13:9

“Simon Peter saith unto him, etc.] Being convinced of his mistake in not submitting to Christ, fearing he should he deprived of communion with him, than which nothing was more desirable to him, or more highly esteemed of by him, says, Lord, not my feet only, but also my hands and my head; which shows the sense he had of the general pollution of his nature, and the need he stood in particularly of having his feet, hands, and head washed both as a minister, and a believer. By his “feet” may be meant, either the grace of faith, which is the foot of the soul, by which it goes to Christ, and walks on in him, and was not without its imperfections; or the affections of the mind, which are that to…”

“Lord, not my feet only, but also my hands and my head--that is, "To be severed from Thee, Lord, is death to me: If that be the meaning of my speech, I tread upon it; and if to be washed of Thee have such significance, then not my feet only, but hands, head, and all, be washed!" This artless expression of clinging, life-and-death attachment to Jesus, and felt dependence upon Him for his whole spiritual well-being, compared with the similar saying in Joh 6:68-69 (see on Joh 6:68-69), furnishes such evidence of historic verity such as no thoroughly honest mind can resist.”

“Not my feet only ... - Peter, with characteristic readiness and ardor, saw now that everything depended on this. His whole salvation, the entire question of his attachment to his Master, was involved. If to refuse to have his feet washed was to be regarded as evidence that he had no part with Jesus, he was not only willing, but desirous that it should be done; not only anxious that his feet should be cleansed, but his hands and his head - that is, that he should be cleansed entirely, thoroughly. Perhaps he saw the spiritual meaning of the Saviour, and expressed his ardent wish that his whole soul might be made pure by the work of Christ. A true Christian is desirous of being cleansed from…”

“Lord, not my feet only - How fain would man be wiser than God! Yet this was well meant, though ignorant earnestness. John 13:10”

“13:9 wash my hands and head as well: Peter misunderstood Jesus (cp. 2:19-20; 3:3-4). Peter thought that to have more water was to have more of Jesus. Only when Peter received the Spirit did everything become clear (e.g., see Acts 2:14-36).”

“not: Psa 26:6, Psa 51:2, Psa 51:7; Jer 4:14; Mat 27:24; Heb 10:22; Pe1 3:21 John 13:10”