P.D Ouspensky recounts a conversation with that old intelligent rascal George Gurdjieff, in his last memoir “In search of the miraculous” which goes along such lines:
“Then one must learn to speak the truth. This also appears strange to you. You do not realize that one has to learn to speak the truth. It seems to you that it is enough to wish or to decide to do so. And I tell you that people comparatively rarely tell a deliberate lie. In most cases they think they speak the truth. And yet they lie all the time, both when they wish to lie and when they wish to speak the truth. They lie all the time, both to themselves and to others. Therefore nobody ever understands either himself or anyone else. Think—could there be such discord, such deep misunderstanding, and such hatred towards the views and opinions of others, if people were able to understand one another? But they cannot understand because they cannot help lying. To speak the truth is the most difficult thing in the world; and one must study a great deal and for a long time in order to be able to speak the truth. The wish alone is not enough. To speak the truth one must know what the truth is and what a lie is, and first of all in oneself. And this nobody wants to know.”
The importance of this needs to be felt and not merely understood by the way of the word.
The fact above needs to soak into your veins, in order that you understand Yourself. Nothing could be more important, surely, and the Masters have always maintained so throughout the Ages.