How do the forces of dharma and karma govern the process of Reincarnation?

The twin beliefs of karma and reincarnation are among Hinduism's many jewels of knowledge. Others include dharma or our pattern of religious conduct, worshipful communion with God and Gods, the necessary guidance of the Sat Guru, and finally enlightenment through personal realization of our identity in and with God. So the strong-shouldered and keen-minded rishis knew and stated in the Vedas.