Samsara
is this world, filled as it is with so much pain and sorrow. All beings
in this world are subject to the law of karma. Karma means
volitional act, that is, something you do, say, or think that is in fact
in your control. Any such act has moral consequences, called vipaka,
which means fruit. In traditional Buddhism, this consequences can occur
in this life, or in a future life.
Most Buddhists believe in rebirth. For many, rebirth is no
different from what the Hindus believed, i.e. reincarnation or
transmigration -- moving from one's old body at death to a new body at
birth or conception. A little more precisely, rebirth is nothing more
than the transmission of one's karma. Buddha likened it to the flame
that passes from one candle to another. So the idea of an immortal
soul, a continuing personality, is definitely not part of the rebirth
idea.
Rebirth and similar concepts are not a part of most westerners'
cultures, so many western Buddhists, as well as some eastern Buddhists,
take rebirth as a metaphor, rather than literally. Buddhism has never
been a particularly literalist religion, so this is not at all taboo.
In fact, Buddha often avoids discussing the reality of one metaphysical
idea or another as irrelevant to the practice of the Dharma.
The image to the right is the Tibetan Wheel of Life, which
represents Samsara. In the very center, there is a rooster chasing a
pig chasing a snake chasing the rooster -- craving, hatred, and
ignorance. Around that are people ascending the white semicircle of
life, and others descending the black semicircle of death. The greatest
portion of the Wheel is devoted to representations of the six realms --
the realm of the gods, the realm of the titans, the realm of humans, the
realm of animals, the realm of the hungry ghosts, and the realm of
demons -- each realm looked over by its own boddhisattva. The outermost
circle is the 12 steps of dependent origination. The entire Wheel is
held by Yama, the Lord of Death.