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Tattvarthasutra
In the sense of "knowledge" and "application," it is of this type. The knowledge that is obscured by delusion (moha) results in a certain kind of spiritual outcome, which is "knowledge-indriya." Knowledge, renunciation, and application combine to form the general and specific qualities of the subject matter, which are referred to as "application-indriya." Application-indriya includes mental knowledge and sight, as well as the forms of non-sight.
The mental knowledge referred to as "bhavendra" cannot comprehend non-substantial entities; it can indeed know substantial entities, but cannot know all their qualities; it can only know the manifestations of smell, taste, touch, sight, and sound.
Question: Each indriya shows both the substance and the nature of two aspects: the substance and the nature itself demonstrate the discrimination of renunciation and application, and knowledge and use respectively. Now, what can be said about the process of their attainment?
The knowledge-indriya is possible only when there is potential for renunciation. There is no application-indriya without renunciation; that is, knowledge, renunciation, and application can only occur when knowledge is attained. Likewise, renunciation must be realized before application and use, and application is possible only when the means are acquired. In summary, the potential for subsequent indriyas arises only when prior indriyas are acquired. However, it is not a rule that the attainment of subsequent indriyas leads to the attainment of prior indriyas.