There have been two lines of progress in this world-political and religious. In the former the Greeks are everything, the modern political institutions being only the development of the Grecian; in the latter the Hindus are everything.
That which is nearest is least observed. The Atman is the nearest of the near, therefore the careless and the unsteady mind gets no clue to it. But the person who is alert, calm, self-restrained, and discriminating ignores the external world and, diving more and more into the inner world, realizes the glory of the Atman and becomes great.
The great lesson is, that unity is behind all. Call it God, Love, Spirit. Allah, Jehovah - it is the same unity that animates all life from the lowest animal to the noblest man.
If you really want the good of others, the whole universe may stand against you and cannot hurt you. It must crumble before your power of the Lord Himself in you if you are sincere and really unselfish.