One irrelevant thought
That started out as a spark
Could be a poisonous dart
That leaves a permanent mark
That's ice cold in the day and burns in the dark
And makes you never wanna see her face again

from Jay Electronica – Eternal Sunshine (of the Spotless Mind) Lyrics on Rap Genius

The jealousy and paranoia of the idea of infidelity can lead a person to do crazy things—it may even drive one’s significant other to the arms of another and become a sort of self-fulfilling prophecy.

Being “Ice cold in the day” suggests walking around emotionally numb while going about your daily routine, while “burn[ing] in the dark” is the emotion that washes over you before you fall asleep and you have nothing to distract yourself from the pain.

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