Jesus had delivered possibly the most offensive sermon ever given in his time, a message so viscerally horrifying, so unspeakably grotesque, that many must have been left actually speechless.
Unbelief is basically a spiritual issue, not an intellectual issue.
All the while, as we wrestle with these passages, and seek to live out their truths as best we can, God is conforming our character to be holy and righteous, as God is.
Faith is in the doing, not in the having. You and I cannot wait for faith to be in place before we act. We can only have faith if we actually use it.
When the disciples saw all those people, what must they have been thinking? Instead of providing their hoped-for rest and retreat, it seemed God was going to ask even more of these physically exhausted and emotionally spent men.