Dig within. Within is the wellspring of Good; and it is always ready to bubble up, if you just dig.
— Marcus Aurelius

The brain that bubbles with phrases has hard work to collect its thoughts.
Unknown bubbling quote

Look within. Within is the fountain of good, and it will ever bubble up, if thou wilt ever dig.
— Marcus Aurelius

War, he sung, is toil and trouble; Honor but an empty bubble.
— John Dryden

All the rights secured to the citizens under the Constitution are worth nothing, and a mere bubble, except guaranteed to them by an independent and virtuous Judiciary.
— bubbling quotation by Andrew Jackson