McKenna's ideas about novelty and the timewave form the connective thread that has helped to alleviate my existential angst. Is there a credible future scenerio that does not end in planetary destruction or mass extinction events? Even though I take solace in Robinson Jeffers' poetry and share his vision of nature's enduring beauty and mankind's incomprehensible penchant for destruction, I'd sure like some assurance that things will turn out fine in the end, that humanity will somehow pass the ultimate survival test, find redemption, achieve illumination, and experience transcendence. That's the hope, no matter how unrealistic or improbable.
I'm sure what appeals to me about McKenna's ideas is his fundamental optimism. Maintaining a sense of humor also helps keep things in perspective, however bizarre things may seem to be. Once you begin to raise questions about the nature of consensus reality, you open up a philosophical can of worms, with all the attendent conundrums and paradoxes, and must deal with squirmy, elusive truths that are not easily grasped.
McKenna still offers the most lucid explanation of our human predicament that I've been able to find. Listen to “A Few Conclusions About Life” for Terence's take on where we're headed.