The brain is a prediction machine. Its predictions determine how much uncertainty we look at and how much fear we feel as a result. To make predictions it uses two mechanisms: what we see, hear, feel and touch (what our senses report) and what we know (what knowledge and experience we have). When our senses don't provide enough information we fall back on what we know. The only thing we know with certainty is the past. Yet we're all heading towards the future.
To navigate the future successfully we need to let the past go. If we don't we will constantly use it as a frame of reference which means our bias will trap us into what we know and feel to be safe (even if it isn't) and it will prevent us from ever moving forward.
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