Moses is told to speak to the rock and instead he strikes the rock. Then he takes credit for the water gushing forth. This sin has grave consequences. Moses is not allowed to lead the people into the land. Are there grave consequences for us when we are disobedient?

Were the people supposed to ask for safe passage through the land? Or were they to trust the pillar and cloud?

The snake that Moses lifted up saved the people from physical death. Jesus saves us from spiritual, eternal death.

John 3:14-15
Just as Moses lifted up the snake in the desert, so the Son of Man must be lifted up, that everyone who believes in him may have eternal life.