Expression: "You should listen to..."

Hi

Could you please tell me if “the” is required here???

Tom

Hi Tom,

You should listen to both sides - no article

You should never listen to one side - no article. It would be better to qualify this as:

You should never listen to one side only.

Alan

Hi Alan,

What about You should never listen to only one side of a story?[YSaerTTEW443543]

TOEIC listening, question-response: Have you gone to lunch yet?[YSaerTTEW443543]

Morning Torsten,

Yes, I like it - it makes ‘one’ more emphatic.

Alan