Karma is linked to the concept of rebirth. There is a continual cycle of life and death that is influenced by karma.
Karma is the action-reaction law that controls life and the soul carries the mental impressions it acquired during its worldly life with it. These attributes are referred to as the soul’s karma. Life does not stop when the physical body dies. The body perishes, but the soul lives on. Samsara refers to the repeating cycles of births and deaths. The soul moves from one physical body to the next and the Hindus believe that each time this occurs, the soul has reincarnated.
Due to a lack of awareness, each soul is trapped in a cycle of reincarnation known as samsara, in which they are born into a variety of physical forms, that includes plants and animals. The soul travels through his series of births until, after many lifetimes of spiritual practice, this Divine essence is fully realized, the cycle of reincarnation is completed and spiritual emancipation is attained.
Prarabdha is what you are currently experiencing. It is the seed of a former deed that has grown into a tree, producing the fully developed fruit you are consuming now. Sanchita is the accumulated karma from your past acts, the consequences of which you will eventually suffer in the future. It is a seed of a tree and the tree will eventually mature and bear the fruit you intend to consume.
Agami is a seed of an action planted now in the present that will bear fruit in the future.
Are you also confused why is something happening to you? What is the cause behind every action or result? Well, it’s a rule of karma and reincarnation.