In 1971 Black Sabbath were unstoppable. They had just released the classic Paranoid and now they would follow it up with an album full of classics. The opener "Sweet Leaf" is a prayer to Sabbath's drug of choice and is one of the songs that apparently inspired "grunge" 20 years later. After that is "After Forever" and this is one of the songs that I let people listen to if they call Sabbath devil-worshippers. They generally don't say it again, with the songs religious attitude. Then "Embryo" leads us into the best song on the album, and arguably the best Black Sabbath song from their whole career. "Children Of The Grave" is a heavy masterpiece about revolution and if you like heavy metal you will love this song. The second half of the album is not as strong as the firt half, but is still the kind of quality that evades most other bands. "Lord of this World" is a heavy rocker, and the worst song on the album, but it is by no means bad. "Solitude" is the softest track, and is similar to "Planet Caravan" from Paranoid. The album finisher is the dirge-like "Into The Void" telling of how we should leave this world behind and is a typical piece of powerful metal by Black Sabbath.
Tony Iommi is showing us hard rock/heavy metal guitar at its peak and backed up by the rythmn section from Hell, Geezer Butler and Bill Ward it just works so well. Add Ozzy wailing over the top of these three master musicians and you get something that is haunting, powerful and brilliant. These four somehow manage to make something that is more than the sum of its parts.
Overall "Master Of Reality" sounds quite raw and brutal and this sound gives it a brilliant atmosphere, which I personally love.