Researches up to date with regard to the function of the confidence (saddha) and wisdom (panna) in the practice of early Buddhism had strong tendency to understand that these two factors, saddha and panna, work ultimately for different purposes in achieving the fruit of Stream-entry (sotapattiphala). The aim of this paper, however, is to reveal, on the contrary, that both saddha and panna are both in need for achieving the fruit of Stream-entry (sotapattiphala), and that they should not be regarded as functioning separately, despite these two factors are in fact being mentioned alternately in Pali materials. Abandoning fetter (samyojana) is the most fundamental standard of classification of the four Noble Ones from arahat to sotapanna (Stream-enterer). Sotapanna is free from the first three samyojanas which are personality-belief (sakkayaditthi), skeptical doubt (vicikiccha), and clinging to rules and ritual (silabbataparamasa). Since sotapanna means that he has abandoned three samyojanas, the method for achieving sotapattiphala is identical with the method of abandoning samyojana. Sakkayaditthi and silabbataparamasa of these three samyojanas are abandoned by panna of No-self (anatta), attained as a consequence of impermanence (anicca) that is the eye for the truth (dhammacakkhu). Since sakkayaditthi which is the view identifying oneself with five aggregates (pancakkhandha), and silabbataparamasa which arises from eternalism (sassataditthi) are result from the wrong view about oneself, they are abandoned by panna of anicca, suffering (dukkha), anatta, which is sotapanna's, panna. The rest vicikiccha occurs in the condition of not having confidence, and it can be abandoned by saddha based on panna, which is sotapanna's saddha. In this way, three samyojanas are abandoned by both saddha and panna belonging to sotapanna. This fact that both saddha and panna are necessary to achieve sotapattiphala is confirmed by descriptions of Buddhist Saints in the literatures. It may well be understood that saddhanusarin and dhammanusarin who belong to sotapattimagga, and saddhavimutta and ditthippatta who belong to sotapattiphala have two separate methods, saddha or panna, in achieving magga and phala, but actually they have equal method. They are just classified according to superior faculty (indriya), endowed with both saddha and panna, and they achieve sotapattiphala by these two elements.
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