Dr. Pangloss felt relieved as everything is what it is meant to be, with no other possibility. I feel relieved as I'm lucky enough to be writing these lines, instead of doing (or getting done by) anything else.
Free your mind, Neo, says Morpheus. The only real world lies in our mind, says Berkeley (nice coincidence, lie and lie). Free humanity, Neo, as it is all in Berkeley's mind.
So sad they never met, Morpheus and Berkeley, humanity would be freed by now.