Watching the harvard justice lectures after someone directed me to them when I started asking philosophical questions. As though like, 'direct your inquiries there please, I have a life to live' - ok 

The lecturer said, "Philosophy estranges us from the familiar, not by supplying new information, but by inviting and provoking a new way of seeing. But - and here's the risk - once the familiar turns strange, it's never quite the same again. Self-knowledge is like lost innocence, however unsettling you find it, it can never be unthought or unknown." 

I smiled.

In a world that can be undeniably cruel and harsh, I am glad that I was somehow given the opportunity to feel the pulse of magic and meaning. Because in bad times, which can last for anything from days to years, it's easy to be suffocated by emptiness and frustration. 

But he's right. Long ago, with a mix of regret and wonder, I wrote the same thing. Once we know something, it cannot be unknown.