We do not only see that people are born with different characters, we also
see that they are born in different surroundings; some people are born in
pleasant surroundings and some people are born in miserable surroundings.
In order to understand this we should not cling to conventional terms such as
'person' or 'surroundings'. If we think in terms of paramattha dhammas we
will see that being in pleasant or miserable surroundings is nothing else but
the receiving of pleasant or unpleasant objects through eyes, ears, nose,
tongue and bodysense. It is kusala vipāka or akusala vipāka. Vipāka
(result) does not arise without conditions; it is caused by good or bad deeds,
by kamma. Different people perform different kamma and each deed brings
its own result. The fact that people are born in different surroundings must
have a condition: it is conditioned by kamma performed in a previous life.
Kamma causes one to be born. The patisandhi-citta is the result of
kamma; it is vipāka.
In this world we see different births of people and of animals. When we
compare the life of an animal with the life of a human being, we notice that
being born an animal is sorrowful; it is akusala vipāka. Being born a human
being is kusala vipāka, even if one is born poor or if one has to experience
many unpleasant things during one's life. The patisandhi-cittas of different
people are of many different degrees of kusala vipāka because the kusala
kammas which produced them were of different degrees.