“I AM that I AM” sums up the whole truth.

M.: ...Your duty is to be: and not to be this or that. 

“I AM that I AM” sums up the whole truth.

 The method is summed up in “BE STILL”. 
What does “stillness” mean? 
It means “destroy yourself”.
 Because any form or shape is the cause of trouble. 

Give up the notion that “I am so and so”. 

Our sastras say: ahamiti sphurati (it shines as ‘I’).

D.: What is sphurana (shining)?

M.: (Aham, aham) ‘I-I’ is the Self; 

(Aham idam) “I am this” or “I and that” is the ego. 

Shining is there always. The ego is transitory;

 When the ‘I’ is kept up as ‘I’ alone it is the Self; when it flies at a tangent and says “this” it is the ego.

(From 'Talks with Sri Ramana Maharshi', Talk 363)