Often the difference between cause and effect is like that between sour and sweet. It is often confusing, yet simple, that the same fruit may be sour when unripe and sweet when ripe. When one begins to understand life from this point of view, the opinion one forms of thought becomes different. There is a great difference between reading a thought externally and reading it from the inside, the source. The one who forms an opinion of the shade has not seen the reality. The effect of a thought is but a shade; the reality is the cause, the source.