Meaning of the word "it is a good horse that never stumbles and a good wife that never grumbles" in English

What does "it is a good horse that never stumbles and a good wife that never grumbles" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

it is a good horse that never stumbles and a good wife that never grumbles

US /ɪt ɪz ə ɡʊd hɔːrs ðæt ˈnɛvər ˈstʌmbəlz ænd ə ɡʊd waɪf ðæt ˈnɛvər ˈɡrʌmbəlz/
UK /ɪt ɪz ə ɡʊd hɔːs ðæt ˈnɛvə ˈstʌmbəlz ænd ə ɡʊd waɪf ðæt ˈnɛvə ˈɡrʌmbəlz/
"it is a good horse that never stumbles and a good wife that never grumbles" picture

Idiom

everyone makes mistakes sometimes, and no one is perfect, even the best people

Example:
Don't be too hard on yourself for that error; it is a good horse that never stumbles and a good wife that never grumbles.
Even the CEO made a mistake today, proving that it is a good horse that never stumbles and a good wife that never grumbles.