as above, so below. yin ∞ yang.

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Image: Untitled by Frank Stella 1960

Sama Vritti (also known as Box Breathing) is a simple but effective way to alleviate stress.
Inhale slowly, counting to 4
Hold the breath in for another 4 counts
Exhale slowly to the count of 4
Hold on empty as you count to 4

Repeat for at least four complete cycles.