Định Nghĩa và Ý Nghĩa của "out of {one's} shell"

What is the origin of the idiom "out of one's shel" and when to use it?

The idiom "out of one's shell" originated from the idea of a turtle or other creature withdrawing into its shell for protection and then emerging from it. The shell represents a metaphorical barrier or protective barrier that isolates someone from others. This phrase is often used to highlight a positive change in someone's behavior or personality, indicating that they have become more open, confident, and willing to interact with others. This idiom can be applied in various contexts, such as describing someone who starts participating in group activities, speaking up in meetings, or engaging in social events with greater ease and comfort.