The vision of the yogi may have been that of some being of the higher planes or it may have been a form of Shiva.
To find the Divine is indeed the first reason for seeking the spiritual Truth and the spiritual life; it is the one thing indispensable and all the rest is nothing without it. The Divine once found, to manifest Him, that is, first of all to transform one's own limited consciousness into the Divine Consciousness, to live in the infinite Peace, Light, Love, Strength, Bliss, to become that in one's essential nature and, as a consequence, to be its vessel, channel, instrument in one's active nature. To bring into activity the principle of oneness on the material plane or to work for humanity is a mental mistranslation of the Truth, these things cannot be the first true object of spiritual seeking. We must find the Self, the Divine, then only an we know what is the work the Self or the Divine demands from us. Until then our life and action can only be a help or means towards finding the Divine and it ought not to have any other purpose.