16:7-11 [It is] because we have taken no bread. The thoughts of the disciples were so fixed upon their failure to supply bread that they thought the remark about leaven contained a rebuke. The Lord reminds them of his creative power, and how it has been put forth.
16:7 They reasoned among themselves - What must we do then for bread, since we have taken no bread with us?
16:5-12 Christ speaks of spiritual things under a similitude, and the disciples misunderstand him of carnal things. He took it ill that they should think him as thoughtful about bread as they were; that they should be so little acquainted with his way of preaching. Then understood they what he meant. Christ teaches by the Spirit of wisdom in the heart, opening the understanding to the Spirit of revelation in the word.