The rip tide

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Your mind is like a river
Where it flows continuesly
It is calm more often
And clear as water
But can sometimes turns
To be like an ocean
Where the tides come out
Waves through the shore
Beneath those rip tide
Lies a countless wrecks
Sometimes even a surprise
It could be dangerous
Or it could be harmless
I thought that I was drowned
Within my emotion
Where it struggling
Just to float
So please calm the sea