The quote suggests that observing the mechanics of your own thinking process is the direct path to self-knowledge. On the surface, it means that by paying attention to what you think, how thoughts arise, and how they shape your perceptions, you gain insight into your own mental landscape. This is a call to introspection, to become aware of the constant stream of mental activity that constitutes your perceived identity.

However, for Krishnamurti, this goes beyond mere psychological observation. He points to the very structure of thought as being inherently divisive and temporal, creating the illusion of a separate 'me' or ego. In the non-dual understanding he championed, the 'self' is not a fixed entity but a construct of thought, a bundle of memories, beliefs, and conditioning. When you truly understand the nature of thought – its origins in the past, its tendency to project into the future, its inherent limitations – you see that the 'self' it constructs is equally ephemeral and unreal. This understanding is not an intellectual accumulation of knowledge but a direct, choiceless awareness that dissolves the very foundation of the ego. It's akin to seeing through a mirage; the moment you understand its nature, its power over you vanishes.

In your life: When you notice yourself reacting emotionally or judging a situation, pause and observe the thoughts that are fueling that reaction, without judgment. See if you can perceive the thought's origin and its illusory nature.