easier said than done

US /ˈiːziər sɛd ðæn dʌn/
UK /ˈiːziər sɛd ðæn dʌn/
"easier said than done" picture
1.

言うは易く行うは難し

something that sounds simple but is difficult to achieve

:
Losing weight is easier said than done.
体重を減らすのは言うは易く行うは難し
Finding a new job quickly is easier said than done in this economy.
この経済状況で新しい仕事をすぐに見つけるのは言うは易く行うは難し