4 Bible Verses about Why Do People Not Do This?

It was customary for the Pharisees, and the disciples of John, to fast; they came therefore and ask'd him, why do John's disciples, and the Pharisees fast so frequently, and not your disciples?

then came the disciples to Jesus in private, and said, why could not we cast him out?

now when Jesus was retired to his own house, his disciples asked him in private, why could not we cast this spirit out?

the baptism of John, whence was it? was it a divine or a human Institution? and they reasoned thus with themselves, if we say, it was divine; he will say, then, why did ye not believe him?