"Philosophy" is a song from Ben Folds Five's 1995 self-titled debut album. It was written by Ben Folds. Folds continues to play the song on various tours as part of his solo career.

The liner notes for the 1998 compilation and rarities album Naked Baby Photos claim, with a hint of sarcasm, that the song is about Folds' penis, "if that's what you think it's about." The piano solo at the end of the track borrows a melody line from Rhapsody in Blue by George Gershwin.

Three live audio versions and two live video versions of "Philosophy" have been released, as has a radio edit of the album cut for a commercial single.

The first of the live audio versions appears on a 1996 promotional CD set from Sony called Modern Rock Live, Volume 1. The 2-disc set was only available with the purchase of a Sony CD player and also featured songs from the Dave Matthews Band, The Posies, Jewel, Blues Traveler, the Violent Femmes, and others.

The second live audio version, recorded at de Melkweg in Amsterdam on March 18, 1997, appears on Naked Baby Photos. While the third version, recorded March 20, 2002, at the Moore Theatre in Seattle during Folds' solo "Ben Folds and a Piano" tour, appears on the 2003 album Ben Folds Live. This version incorporates the Dick Dale surf rock classic "Misirlou" into the song.

Of the two live video versions of the song, the first – set to a montage of footage filmed at Georgetown University's Gaston Hall in Washington, DC; Cabaret Metro in Chicago; and in Australia – appears on Spare Reels, a video packaged in a limited edition offering of the 1999 album The Unauthorized Biography of Reinhold Messner.

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