Samsara is the cycle of reincarnation. It is recognized in both Hinduism and Buddhism. This cycle takes place as a soul learns to end suffering by participating in wholesome Karma. Karma is not a matter of being judged it is simply a result of the actions of a soul. It happens without any conscious effort.
So as you go through your life all your acts and thoughts create Karma either wholesome or unwholesome. There is also Karma that is neutral such as breathing. You can imagine some unwholesome Karma may be bountiful if you must examine even your thoughts and unspoken words. Buddhism allows for as many cycles as it takes for you to transcend unwholesome Karma. This is referred to as Nirvana.
The word Nirvana itself comes from a Sanskrit word meaning, “to extinguish”. In Buddhism this would mean the soul has been able to extinguish hatred, ignorance and earthly suffering. While the Samsara is unique and perhaps hard for Westerners to comprehend, the theory of Nirvana should be quite simple. It would be the same as reaching perfection through Christ and being in Heaven. Or if you were a Mormon, you would reach the highest degree of glory. If you were part of the Community Baptists in our area it would be the equivalent of being saved. There is no more suffering.
So no matter what religion or life path you choose to take it seems like there is a similar goal. A simple idea that we should be kind to each other and do wholesome things seems to prevail. I think this understanding should begin every discussion you may have with others about religion and lifestyles.
Listen with your heart and then follow it carefully.