The Severance of Doubt in the Laṅkāvatāra Sūtra

Original: Mahamati, the characteristic of doubt refers to the state where one attains the sign of correct perception regarding the Dharma. Due to the cessation of the two previously mentioned kinds of self-view delusions, doubt about the Dharma does not arise. One does not form an opinion elsewhere about the Great Master, speculating whether it is pure or impure. This is called the characteristic of doubt, which the Srotapanna has severed.

Explanation: The Buddha said, "Mahamati, the mental characteristic of a doubtful view is what is called the mental state of having attained true knowledge and perception regarding the Dharma, of correctly discerning the characteristics of the Dharma, and of clearly knowing whether the Dharma accords with principle or not. Furthermore, because the previously mentioned innate self-view and delusional self-view have been severed, mental doubts about the Dharma no longer arise; one no longer doubts whether the Dharma is truly in accord with principle or not. Since doubt has been eliminated from the mind, one no longer seeks evidence elsewhere to prove whether one's own understanding is pure or impure, or whether one has attained the purity of the Dharma-eye or not. He who harbors such doubts possesses the characteristic of doubt, which the first-stage Srotapanna has already severed."