It's also the last of Al's 70's secular albums, although much of the Belle Album is pretty clearly about The Lord. Lest the religious lyrical content scare you off, just know that this album is groovy as hell. Al is in top form and doing just fine on his own in the studio.
There's good reason that this is called The Belle Album. The opening tracks sets the tone so well that it really couldn't have been called anything else. Throw it on, feel good, that is all.