I have faith in God similar to how I have faith in the sun. Not because I can see it, but because I can not see without it.
I believe in Christianity as I believe that the sun has risen: not only because I see it, but because by it I see everything else.
C.S. Lewis

C.S. Lewis is rolling in his grave
As for me, the more sun I get the happier I am, which makes for some pretty depressing January and Februarys.
Where do you start to look for truth without resorting to quoting or arguments based on traditions that evolved out of quoting?
When you are conscious you become aware of your awareness. This means that you can observer yourself observing. In this way, during a moment of happiness, you can step outside of the moment and observe yourself being happy.
Being happy that someone else is happy is very contradictory to human instinct .
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.....much as we would like to think we are not animals with animal instincts we are always confronted with the fact that we are.
In the coarse of becoming a real person in the exostentialist tradition a person must come to terms with Kierkegaard's "dread" or Sartre's "misery" in that while we are not predictable we can be happy for ourselves when we are happy.