Here on earth we can only experience one half at the most of everything through which we pass. We really experience only half of what takes place in every one of our experiences. Let us take an example. Imagine — this applies both to good and to evil thoughts and actions — but let us take as an example an evil action. Imagine that you say something bad to another person and that your words hurt him. When we say something unkind we only experience that part which concerns us personally; we only experience the feelings that prompted us to say those evil words. This is the soul-impression which we gather when we say bad and unkind things. But the other person to whom we addressed our unkind words has an entirely different impression; he has, as it were, the other half of the impression and feels hurt. The second half of the impression lives in him. What we ourselves experience during our physical life on earth is one thing, and what the other person experiences is another thing.
Now imagine the following. After our death, when we pass backwards through our life, we must once more live through everything that other people, outside, have experienced through us. As we go backwards through our life, we experience the effects of our thoughts and actions. Between death and a new birth we therefore pass through our life by going through it backwards.
Source: Rudolf Steiner – GA 168 – THE MOMENT OF DEATH AND THE PERIOD THEREAFTER – Leipzig, 22 February 1916