Meaning of the word "a ship in a harbor is safe but that is not what ships are built for" in English

What does "a ship in a harbor is safe but that is not what ships are built for" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

a ship in a harbor is safe but that is not what ships are built for

US /ə ʃɪp ɪn ə ˈhɑːrbər ɪz seɪf bʌt ðæt ɪz nɑːt wʌt ʃɪps ɑːr bɪlt fɔːr/
UK /ə ʃɪp ɪn ə ˈhɑːbər ɪz seɪf bʌt ðæt ɪz nɒt wɒt ʃɪps ɑː bɪlt fɔː/
"a ship in a harbor is safe but that is not what ships are built for" picture

Idiom

a proverb meaning that while it is easy to stay in a comfort zone or avoid risks, the purpose of life or progress is to face challenges and explore

Example:
I was afraid to start my own business, but then I remembered that a ship in a harbor is safe, but that is not what ships are built for.
You should take the job offer abroad; a ship in a harbor is safe, but that is not what ships are built for.