The important thing is not to stop questioning. Curiosity has its own reason for existing. One cannot help but be in awe when he contemplates mysteries of eternity, of life, of the marvelous structure of reality. It is enough if one tries merely to comprehend a little of this mystery every day.
We have no right to assume that any physical laws exist, or if they have existed up until now, that they will continue to exist in a similar manner in the future.