The twin pillars

[Sunhoek]

What simply does the expression mean ???

Could anybody tell me why people use the expression for ??

Thanks a lot
Sunho

[Vietanhpham_Winter]

I'm not sure but the word twin may refer to two things that are similar to each other. So, I think this is to express resemblances. Let's wait for the evaluations.
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[Raptor Jesus]

without context its hard to say but pillars usually refers to the foundation of something.

Example: The five pillars of islam...