The human being is like a building with 10 doors, which are the 10
senses called indriyas. It is through the indriyas that the indweller
communicates with the external world. The process of self-
exploration, in a sense, begins with these 10 senses. They are
literally observed in action as a part of sadhana (spiritual
practices), both in daily life and at meditation time.
Here's a new paper on the website that is about the 10 indriyas:
In loving service,