天经地义 (tiān jīng dì yì): A matter of course / natural and reasonable — Meaning & Stroke Order

Children should listen to their parents; this is a matter of course.

Isn't it a matter of course for children to support their elderly parents?

He actually thought it was natural and reasonable for the company to provide him with a private jet, which is a ridiculous idea.

Studying hard is essential to achieving good grades; this is a self-evident truth.

In a formal agreement, both parties adhering to the spirit of the contract is a fundamental and reasonable principle.

It's a matter of course for friends to help each other, so you don't need to feel embarrassed.

Protecting the environment is everyone's responsibility; this is not only a natural duty but also crucial for humanity's future.

It is natural and reasonable to work hard for rewards, but one should also know how to enjoy life.