Q: What are the indicators based on which I shall be enabled to find out for myself whether I am doing vichara correctly or not? 
B: If vichara has resulted in a state of mind wherein it abides as identical with pure Subjective Consciousness, then you have done it correctly. However, it is not easy for the neophyte to tell whether his mind is presently abiding as identical with pure Subjective Consciousness, because the torpid mental state of manolayam [state where mind structures are hazily projected] is often mistakenly regarded as being the tabula-rasa mental state of pure Subjective Consciousness. 
      When mind abides as identical with pure Subjective Consciousness, it unmistakeably scintillates ‘I’-’I’. Thus, the definitive answer to your question is that vichara has been done correctly when doing it has resulted in the Aham Sphurana flashing forth.
 

Q: And how to recognise the Aham Sphurana when it ‘flashes forth’? 
B: There is no possibility of mistaking it when the experience actually occurs. Whatever description is given, is not only useless but also counter-productive, because if a description of the experience of Aham Sphurana is given, the mind twists and contorts the present banal experience of outward protruding, satiation craving mental impulses into one that seems to perfectly match with the description given; because it wants to avoid getting destroyed.
       So, even if you have heard a description of the experience of the Aham Sphurana being furnished in this Hall, please make no effort to recollect it. When the Aham Sphurana actually flashes forth, you will know it alright. Cognition of the Aham Sphurana is not based on intellectual corroboration it is a direct experience of the Self, inferior only to the Sahajastithi of the Jnani.

Q: It cannot be denied that it is sexual desire that causes man to engage in coitus, even when reproduction is not the motive.
B: You ask about the biological sexual urge. That is impregnated in the ego mind body complex to facilitate reproduction, according to nature’s design. If the act did not involve pleasure, man would likely ask ‘Why should I give birth to children?’
     What is the highest joy man can know? It is the state of no-mind. Daily he experiences it in sleep. Only the yogi has experience of it in waking; for the Jnani there can be no question of experiencing anything. So, nature has seen fit to introduce this bliss of no-mind in the coital act.
       A moment before the commencement of the spasms that bring about emission of the seminal fluid, for precisely 1/128th of a second, the mind is removed. It is like a plate being exposed with a very quick shutter speed. The impression of the bliss tasted, leaves behind a strong craving for more such bliss in the mind. This is how men end up addicted to the act.