The six causations of the 六位 six stages of Bodhisattva development, q. v. Also, the sixfold division of causes of the Vaibhāṣikas (cf. Keith, 177-8); every phenomenon depends upon the union of 因 primary cause and 緣 conditional or environmental cause; and of the 因 there are six kinds: (1) 能作因 karaṇahetu, effective causes of two kinds: 與力因 empowering cause, as the earth empowers plant growth, and 不障因 non-resistant cause, as space does not resist, i. e. active and passive causes; (2) 俱有因 sahabhūhetu, co-operative causes, as the four elements 四大 in nature, not one of which can be omitted; (3) 同類因 sabhāgahetu, causes of the same kind as the effect, good producing good, etc.; (4) 相應因 saṃprayuktahetu, mutual responsive or associated causes, e. g. mind and mental conditions, subject with object; Keith gives 'faith and intelligence'; similar to (2); (5) 遍行因 sarvatragahetu, universal or omnipresent cause, i. e. of illusion, as of false views affecting every act; it resembles (3) but is confined to delusion; (6) 異熟因 vipākahetu, differental fruition, i. e. the effect different from the cause, as the hells are from evil deeds.