158 DR. BABASAHEB AMBEDKAR : WRITINGS AND SPEECHES
These reasons for expulsion from caste indirectly show the rules and regulations of the caste. But all regulations are not fundamental. There are many which are unessential. Caste can exist even without them. The essential and unessential can be distinguished by asking another question. When can a Hindu who has lost caste regain his caste. The Hindus have a system of Prayaschitas which are penances and which a man who has been expelled from caste must perform before he can be admitted to caste fellowship. With regard to these Prayaschitas or Penances certain points must be remembered. In the first place there are caste offences for which there is no Prayaschita. In the second place the Prayaschitas vary according to the offence. In some cases the Prayaschita involves a very small penalty. In other cases the penalty involved is a very severe one.
The existing of a Prayaschita and its absence have a significance which must be clearly understood. The absence of Prayaschita does not mean that any one may commit the offence with impunity. On the contrary it means that the offence is of an immeasurable magnitude and the offender once expelled is beyond reclamation. There is no reentry for him in the caste from which he is expelled. The existence of a Prayaschita means that the offence is compoundable. The offender can take the prescribed Prayaschita and obtain admission in the caste from which he is expelled.
There are two offences for which there is no penance. These are (1) change from Hindu Religion to another religion, (2) Marriage with a person of another caste or another religion. It is obvious if a man loses, caste for these offences he loses it permanently.
Of the other offences the Prayaschitas prescribed are of the severest kind are two: (1) Interdining with a person of another caste or a nonHindu and (2) Taking to occupations which is not the occupation of the caste. In the case of the other offences the penalty is a light one almost nominal.
The surest clue to find out what are the fundamental rules of caste and what caste consists in is furnished by the rules regarding Prayaschitas. Those for the infringement of which there is no Prayaschita constitute the very soul of caste and those for the infringement of which the Prayaschita is of the severest kind make up the body of caste. It may therefore be said without any hesitation that there are four fundamental rules of caste. A caste may be defined as a social group having (a) belief in Hindu Religion and bound by certain regulations as to, (b) marriage, (c) food and (d) occupation. To this one more characteristic may be added namely a social group having a common name by which it is recognized.