There were infinite circles,

[confliction]

Drawn on the wall,
And to some they were sacred,
To others, a scrawl.

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I keep spotting many cycles in life,
patterns of various kinds,
all probably rather subjective,
but let me share this and see what you think.

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As Laughing is a sign of Happiness,
Crying, is a sign of Sadness.

And in the Cycles of Life,
The Circle of Laughing and Crying meet together...

Where you can feel so Sad,
Your Crying sounds like Laughing to others...
Or you can feel so Happy,
You Cry.

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Just a quick edit:

I've also been thinking more and more about contrasts.
You need sadness, in order to know what happiness is.
But my recent idea about them being in the same circle...
...relates them more to each other.
Part of the same 'whole' as it were.

In Equilibrium Sean Bean's character says...
...in a matter of speaking...
...that all the negative emotions are a price he'd gladly pay,
for all the positive ones.

I agree.