You can understand other people only as much as you understand yourself and only on the level of your own being. This means you can judge other people's knowledge but you cannot judge their being. You can see in them only as much as you have in yourself. But people always make the mistake of thinking they can judge other people's being. In reality, if they wish to meet and understand people of a higher development than themselves they must work with the aim of changing their being.
P.D. Ouspensky