I shall briefly tell you that state which Vedic Knowers hold as Indestructible, which those transcending desires enter, and seeking which people observe life-long celibacy.
Krishna explains the supreme abode the seeker has to aim at and reach. Almost all devotees and seekers generally do not have a clear idea about God, Soul and the Supreme abode. Krishna wants this gap to be properly filled. So, as a prelude, he says he will explain it to Arjuna as well as for all the rest.
Vedas, the primordial source of spiritual wisdom and revelation, describe the supreme Abode. Seekers observe various austerities to purify themselves and attain this supreme goal of life. So too, many adopt life-long celibacy to empower themselves to reach it.
On hearing a description of this kind, there will hardly be anyone who will not feel greatly inspired to strive for attaining such an abode as soon as possible, especially in this very lifetime!