I do believe in karma but not in its transference to any other life since according to my belief there is none. As in the Buddhist parlance, Aupmanyav is the accretion of various elements in a particular shape which keeps changing according to laws of nature (he had a thick flock of black hair, now the hairline has receded and his hair are white with black streaks) with a certain education, training (samskaras) and experiences; and acts accordingly. This whole is not going to happen again. During this life, if a person is taught about dharma then he/she will act accordingly, engage in righteous action and refrain from evil deeds. These deeds are going to affect the person materially and psychologically. Aupmanyav arose from a million things and when he is no more, those elements would go back to nature again and will be a part of millions of things. As I said Aupmanyav has already transcendented the the idea of many to the idea of one, and that is the end, there is no further to go.