If Christ did not want to dismiss the Jews without food in the desert for fear that they would collapse on the way, it was to teach us that it is dangerous to try to get to heaven without the Bread of Heaven.
Let us learn upon earth those things which can call us to heaven.
It is worse still to be ignorant of your ignorance.
Why do you not practise what you preach.
Do not marvel at the novelty of the thing, if a Virgin gives birth to God.
Always be doing something worthwhile; then the devil will always find you busy.