Concept of action and reaction or as one gives so shall one receive. Probably originated in the religion of Hinduism and carried over into Buddhism. Can be taken in the sense or as relevant to this life alone or as also applicable in future reincarnation. Karma means that the individual creates their own destiny by the actions taken. Thus if an individual does bad to others, sooner later that karma or those actions shall be visited on the perpetrator. Those who live by the sword die by the sword. In terms of reincarnation, means the state of one's present life is determined by the individual's conduct in past lives, and that future lives will be determined by actions in present life. {Commentaries: Karma and Buddhism}

Empirical Knowledge
For the access of the greatest degree of knowledge based upon real experience, it must be assumed that the individual can learn and know what anyone else could learn and know, by a similarity of experience based upon a same or similar Human Sensory Apparatus, and a universality of access to similar circumstance. Real experience produces real consequences in which one's reaction is required to be responsible. Abstract knowledge does not necessarily involve consequences, in which the individual would be subject, and thus is free to believe anything which is convenient. {Dissertations: Consequence and External Analysis}