what does "to its core" mean in this sentence...

[Masoomeh]

Hello everybody, I would be glad if someone tell me what does "to its core" mean in this sentence:

Patients view the medical profession as selfish to its core.

thanks in advance,

Masoomeh

[Mister Micawber]

.
Selfish to its core = fundamentally selfish; selfish by its basic nature
.
_________________
Native English teacher at Mister Micawber's

[Alan]

Hi,

This use of 'core' is also used in the expression: 'rotten to the core' suggesting bad/corrupt through and through -the core being the central part of a fruit such as an apple.

Alan
_________________
English as a Second Language
You can read my ESL story Present Simple

[Masoomeh]

Hi dear Mister Micawber and Alan,
I have got it ,thanks a lot. It exactley matches.

with all best wishes,

Masoomeh