And to be such, one must first of all, with an indefatigable persistence and an unquenchable impulse of desire, issuing from all the separate independent parts constituting one’s entire common presence, that is to say, with a desire issuing simultaneously from thought, feeling, and organic instinct, work on an all-round knowledge of oneself – at the same time struggling unceasingly with one’s subjective weaknesses – and then afterwards, taking one’s stand upon the results thus obtained by one’s consciousness alone, concerning the defects in one’s established subjectivity as well as the elucidated means for the possibility of combatting them, strive for their eradication without mercy towards oneself. BTG XLVIII

To cross into the other stream is not so easy – merely to wish and you cross. For this, it is first of all necessary consciously to crystallize in yourselves data for engendering in your common presences a constant unquenchable impulse of desire for such a crossing, and then, afterwards, a long corresponding preparation. BTG XLVIII