“If I knew what I was so anxious about, I wouldn't be so anxious.”

Source: Mansfield Park

Source: Wittgenstein's Mistress

Source: The Warden (1855), Ch. 3

(A.J. Broomhall. Hudson Taylor and China’s Open Century, Book Two: Over the Treaty Wall. London: Hodder and Stoughton and Overseas Missionary Fellowship, 1982, 192).

Thank Goodness! (2006)
Context: Friends were anxious to learn if I had had a near-death experience, and if so, what effect it had had on my longstanding public atheism. Had I had an epiphany? Was I going to follow in the footsteps of Ayer (who recovered his aplomb and insisted a few days later "what I should have said is that my experiences have weakened, not my belief that there is no life after death, but my inflexible attitude towards that belief"), or was my atheism still intact and unchanged?
Yes, I did have an epiphany. I saw with greater clarity than ever before in my life that when I say "Thank goodness!" this is not merely a euphemism for "Thank God!" (We atheists don't believe that there is any God to thank.) I really do mean thank goodness! There is a lot of goodness in this world, and more goodness every day, and this fantastic human-made fabric of excellence  is genuinely responsible for the fact that I am alive today. It is a worthy recipient of the gratitude I feel today, and I want to celebrate that fact here and now.

Source: Batman: The Killing Joke

"The Productions of Time", Time and Tide, Vol. XXII, No. 4 (25 January 1941), pp. 72–73

Source: The Importance of Being Earnest