All things must pass isn’t about colon cleanse reviews, but does mean that nothing lasts forever. The origin of the phrase is again the King James Bible from Matthew 24:6-8:

And ye shall hear of wars and rumours of wars: see that ye be not troubled: for all these things must come to pass, but the end is not yet.
For nation shall rise against nation, and kingdom against kingdom: and there shall be famines, and pestilences, and earthquakes, in divers places.
All these are the beginning of sorrows.

The phrase was used by George Harrison for the title of his 1970 album.