Symbols - What does heaven look like
The forest clearing is often found in spiritual experience as being a place where spirit helpers meet with the experiencer to provide assistance - help the person to 'see the wood for the trees'. Thus it takes on the symbol of a place of clarification, a place where things become clearer - almost a literal meaning.
Given that the forest is a place where subconscious truths are discovered, the clearing is also often the place where truths about our underlying subconscious are revealed to us, things we would not have been able to deduce via our conscious mind because they are 'hidden'.
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