What idioms describe "ostrich mentality"?

Be content in a corner, deceive yourself, deceive yourself, deceive yourself, and not strive for progress.

Idiom interpretation and sentence making:

Settle down in a corner. Peace of mind in the corner. Describe the corner of Gou An, not striving for progress.

Sentence: There is no place on the earth where the surface can stay in a corner. The great power of nature constantly creates mountains and rivers by ingenious methods, but the long river of time hides all this quietly and creates the illusion of stillness.

Self-deception [ziq and qé ré n] Self-deception.

Sentence making: Now, we should accept the truth frankly and can't continue to deceive ourselves and others.

Stealing the bell [y m 4 n ě r dà o lí ng] Cover: cover, cover; Steal: steal. Steal the bell and cover your ears for fear that others will hear you. Metaphorically, you are deceiving yourself, and you must try to cover up what you can't cover up clearly.

Sentence: He never does anything to hide his ears.

Self-deception [q: ré n z: q: self-deception. Self-deception.

Sentence making: But after all, these are just fools, deceiving themselves and others.

I don't want to make progress.] I don't want to make progress, and I don't want to do anything.

Sentence: how can young people feel at ease if they want to work hard?