Rather than just reacting with "What a load" after reading Asa's post (no offense intended, Asa, but I do not buy your premises, inductions, or conclusions - sorry!), I thought, "I should instead try to think of something within it, or suggested by it (to me), that I can agree with."
As it relates to the header of this post, that is. And this is what I came up with:
It's not tubes - or transistors - that 'Do It'; It's your brain.
:-)