If you guide from the shadow of fear just one lost spirit and the illusion of hopelessness, misery and isolation it creates, to the light of Love and the reality of faith, happiness and oneness it is, you will fundamentally change the world. 

Even if that one lost spirit is you.

In fact most significantly and importantly if it is you, as there is no way you can guide another if lost to the shadow yourself you still are that spirit BEING.
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“Stand still. The trees ahead and bush beside you are not lost.” ~ Albert Einstein