This compilation of lectures on Vedanta by Swami Sarvagatananda helps the reader envisage the perfect relationship between the most ancient Vedantic truths and the later developed religious thoughts and bases them on the same principle of oneness, which naturally harmonizes different religions and transcends belief systems.
There is only one sin -- and that sin is weakness. When I was a boy, I read Milton's Paradise Lost. The only good man I had any respect for was Satan. The only saint is the soul who never weakens, faces everything, and determines to die game.
-Swami Vivekananda