Since childhood, you have always been taught, “if you ought to do bad to someone that returns to you in future”. Well, this is called karma, and we all know about this. Samsara has the literal meaning which means a cycle of rebirth and reincarnation. Where your soul is reborn, again and again. We have often heard about that after our death, we are again reborn in some other place, in the universe and living our lives again.
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This happens in our current life, reflected through karma. Samsara is a Sanskrit word and it is used for several religions like Buddhism, Hinduism, Taoism, and others. It says an individual current existence is a multitudinous life, they have lived in the past and future.
Source: www.chinabuddhismencyclopedia.com
It is also a yogic philosophy, when you practice yoga you come directly close to moksha, which means freedom through enlightenment. Which can give freedom from the cycle of samsara? The goal of an individual to end the cycle of samsara is by taking moksha and nirvana (an ideal place).
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For a deeper understanding of what samsara is, you need a yogi who will teach you a meditation to get the deeper meaning, where you can change the state of mind from negative to positive. The practitioner will set the ultimate goal of liberation in your mind, which is exactly the game of Samsara.
In Buddhism, Samsara is considered mundane. It is unsatisfactory, painful, prolong with desire and ignorance. Which at last results into karma. It happens in your brain, which physically makes you do it.