Jesus said:- "Know what is in front of your face, and what is hidden from you will be disclosed to you

Without knowing the nature of the world, it is impossible to know truth. It is of no use of trying to find the truth before one understands the world. The world which confronts one is consciousness itself because the body and the world are created out of consciousness."

If one does not make his induction from facts from the world before him, the world of the five senses, he is only drawing on his imaginations. Then he says “The ‘Self’   is like this, or like that." but it will be only his imagination within the waking experience.

First seeker must inquire into the nature of the physical body i.e. matter. Second he must inquire into the nature of the mind

Jesus said:-  "Know what is in front of your face, and what is hidden from you will be disclosed to you. (THE GOSPEL OF THOMAS- Saying 5)

It means one has to know the world which confronts him confronts to realize his body and world are made of the same essence and that essence is Spirit [father]. 

Sage Sri, Sankara said:- one must first know what is before him. If he cannot know that, what else can he know or understand? If he gives up the external world in his inquiry, he cannot get the whole truth.

Sage Sri, Sankara said:- VC -63. Without causing the objective universe to vanish and without knowing the truth of the Self, how is one to achieve Liberation by the mere utterance of the word Brahman? — It would result merely in an effort of speech.

"Jesus said:-"Those who seek should not stop seeking until they find. When they find, they will be disturbed. When they are disturbed, they will marvel, and will reign over all." (Gospel of Thomas 2)

"The Kingdom of God is inside you and all around you, Not in a mansion of wood and stone.  Split a piece of wood and God is there, Lift a stone and you will find God." (Gospel of Thomas)

 The truth has to be proved without the scriptural authorities. The scriptural authorities cannot be accepted as proof until it is verified thoroughly in pursuit of truth. Intellectually knowing the truth is only an imagination, whereas realizing the truth knows it as such.

Truth is not only that which is beyond contradiction, but also that in which is no possibility of contradiction. Such a state can only be realized as non-duality, where there are no second thing. The illustration for that is deep sleep but sleep is not the ultimate reality. It is merely an analogy. "If one think there is another entity whether man or God there is no truth." This is the truth of those who have inquired and reasoned on the true base.