I don't think Sagan's love for the audience could be the byproduct of the chemicals he used. There are people who are born musicians or engineers (like me). He was born a teacher.
I watched Cosmos on my teens, late at night (actually, past midnight on Fridays, which made my early Saturday classes painful, but that's another story) on a TV station not particularly known for their love of science or reality. A couple posts back, there was a discussion opposing science and religion. Both are quests for ultimate truths opposed only by the methods of their search.
When I look deep in the sky, when I contemplate the mindboggingly vast emptiness punctuated by countless whirlpools of countless stars being violently born and evolving during the ages to their fiery (or cold) deaths, of which we only see an infinitesimal fraction, or the extremely small and quick, the things we cannot see, that we can barely measure and that are so faint that border non-existence, or the irrelevance of existence of pure math, it it's impossible not to feel the same deep wonder that's associated with religious experience. Science is humbling.
I do not envy the religious (or those who call themselves such) for they take a shortcut into a comforting notion of their Truth when it's not the destination that matters - it's the quest. I hope this new Cosmos puts more kids like me on the right path.