Low levels or low dimensions

"ino naka no kawazu, taikai wo shirazu."

A frog in a well never knows ocean.

this phrase just explain a certain moment of nature,
if you want to think deeply, or if you want an interpretation, then it will be like this,

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As long as you stay low levels or low dimensions, its impossible to realise how the world is big,
As long as you stay low levels, your life will  end staying low,
Longer and longer u relax and be filled in a well, harder and harder u quite from well,
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there were at least one person who realise the moment,
we still never know about the ocean so much yet.

see also:
"ki wo mite, mori wo mizu"
can't see the forest for the trees