easier said than done
Also, more easily said than done. Describing something more readily talked about than accomplished, as in Keeping the cats off the sofa is easier said than done. This expression also was put as sooner or better said than done. Today, the variant (more easily) is still heard less often than the original. [c. 1450]
Dictionary.com presents 366 FAQs, incorporating some of the frequently asked questions from the past with newer queries.