日本語で言うと、「言いたい人には、自由に言わせておけばいい（そんな人の言葉を気にする必要ない）」という意味です。 This sentence means 'Let them say what they want to say.' As the proverb goes, 'Sticks and stones may break my bones, but words will never hurt me.' I hope I can be of service to you.

See my answer.