A Summary of the Srimad Bhagavatham : Ch-5. Part-15.
5: Narada Instructs Yudhisthira on Ashrama Dharma :
Part - 15.
So, the meditation of a Sannyasin is direct unified experience of consciousness with Reality. This is, finally, the catching of the Universal ‘I’ by the so-called individual ‘I’, in its attempt at unification of its ‘I’-ness with the Universal ‘I’. There are many ‘I’s in this world. You have an ‘I’-ness, I have an ‘I’-ness, and everybody is ‘I’. But these are empirical ‘I’s—physical ‘I’s, as it were, conditioned by physical bodies—and so it appears to us that there are many ‘I’s everywhere. But these ‘I’s are drops in the ocean of one single ‘I’, which is the ‘I’ of God, of the Universal Being. Catch it! Catch that Supreme ‘I’ which is inclusive of every ‘I’, as drops are included in the ocean. This Total ‘I’ is very difficult to attain or even conceive. Where is this Total ‘I’? It is the pure Universal Subjectivity, and is bereft of even a touch of externality. That is the Supreme ahamgraha upasana, meditation on the great ‘I’ of the universe—the Supreme Self, the Supreme Total, the Supreme unified consciousness identified with the Supreme Being.
Continuous meditation on That, and living for That, is called brahmabhyasa in the scriptures. Tat chintana? tat kathana? anyonya? tat prabodhanam, eta deka paratva? ca brahm?bhy?sa? vidur budh?? (Pan. 7.106) is a verse from the Panchadasi, and also from the Yoga Vasishtha. Tat chintana?: Think only That. Whatever be the circumstance of your life, wherever you are placed and whatever you may be doing, do not forget this. Think only That, think only That, think only That.