In this talk, Krishnamurti contrasts the states of concentration and attention.
Concentration is our normal experience - thinking about one thing or the other at the exclusion of everything else.
He uses the word attention to describe a mind in meditation:
Attention has no frontier. Please follow this closely. A mind in the state of attention is not limited by the frontier of recognition. Attention is a state in which there is complete awareness of everything that is taking place within and about one, without the border or frontier of recognition which exists in concentration.
It seems impossible to look, observe anything without the process of recognition kicking in, no? Is that process not automatic, involuntary? How would we even know it is happening if there is no recognition?
And if attention were somehow possible, a big if, is it meant to be occurring alongside the normal process of concentration and the value to us, the concentrator, is that attention would allow us to see more clearly, using the normal process of recognition but now with more expansive information? Is this what K means by self-knowledge?