In the Katha Upanishad you will find these words (Max Muller's translation): "As rainwater that has fallen on a mountain ridge runs down on all sides, thus does he who sees a difference between qualities run after them on all sides." This is the figure of the man who does NOT rest. And it is a powerful likeness. The thunder shower descends on the mountain top; torrents of water pour down the crags in every direction. Imagine the state of mind of a man--however thirsty he may be--who endeavors to pursue and intercept all these streams! But then the Upanishad goes on: "As pure water poured into pure water remains the same, thus, O Gautama, is the Self of a thinker who knows." What a perfect image of rest! Imagine a cistern before you with transparent glass sides and filled with pure water. And then imagine some one comes with a phial, also of pure water, and pours the contents gently into the cistern. What will happen? Almost nothing. The pure water will glide into the pure water--"remaining the same." There will be no dislocation, no discoloration (as might happen if MUDDY water were poured in); there will be only perfect harmony. I imagine here that the meaning is something like this. The cistern is the great Reservoir of the Universe which contains the pure and perfect Spirit of all life. Each one of us, and every mortal creature, represents a drop from that reservoir--a drop indeed which is also pure and perfect (though the phial in which it is contained may not always be so). When we, each of us, descend into the world and meet the great Ocean of Life which dwells there behind all mortal forms, it is like the little phial being poured into the great reservoir. If the tiny canful which is our selves is pure and unsoiled, then when it meets the world it will blend with the Spirit which informs the world perfectly harmoniously, without distress or dislocation. It will pass through and be at one with it. How can one describe such a state of affairs? You will have the key to every person that you meet, because indeed you are conscious that the real essence of that person is the same as your own. You will have the solution of every event which happens. For every event is (and is felt to be) the touch of the great Spirit on yours. Can any description of Rest be more perfect than that? Pure water poured into pure water.... There is no need to hurry, for everything will come in its good time. There is no need to leave your place, for all you desire is close at hand. Here is another verse (from the Vagasaneyi-Samhita Upanishad) embodying the same idea: "And he who beholds all beings in the Self, and the Self in all beings, he never turns away from It. When, to a man who understands, the Self has become all things, what sorrow, what trouble, can there be to him--having once beheld that Unity?"--What trouble, what sorrow, indeed, when the universe has become transparent with the presences of all we love, held firm in the One enfolding Presence?