To have self-knowledge is to know the ways of your mind, to be aware of its subtleties, with all their implications; and for that you don't have to read a single book.

J. Krishnamurti

The Religious Man

But the religious man is he who, through self-knowledge, begins to discover his conditioning and to break through it; and the breaking through is not a matter of time.

Krishnamurti Poona 6th Public Talk 24th September 1958

What is formulated is not true

There is no path to truth. Truth must be discovered, but there is no formula for its discovery. What is formulated is not true. You must set out on the uncharted sea, and the uncharted sea is yourself. You must set out to discover yourself, but not according to any plan or pattern, for then there is no discovery. Discovery brings joy - not the remembered, comparative joy, but joy that is ever new. Self-knowledge is the beginning of wisdom in whose tranquillity and silence there is the immeasurable. 

Krishnamurti "Commentaries on Living Series I, My Path and Your Path"

Self-knowledge

Self-knowledge cannot be gathered through anybody, through any book, through any confession, psychology, or psychoanalyst. It has to be found by yourself, because it is your life.

Krishnamurti

Yoga is a living process

Yoga is a living process. The heart of Yoga does not lie in visible attainments; it lies in learning and exploring. Learning is a process, a movement, while attainments are static. One is internally learning about the whole field of life using the energy systems of one's mind and body to find out how universal patterns express theselves through individuals. Yoga also involves the process of freeing one's energy, moving out of the blocks and binds that limit one both physically and mentally. Freeing oneself is part of the process of self-knowledge for one's binds limit the nature of exploration, just as releasing them permits learning to occur.

Joel Kramer in "A New Look at Yoga"