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CHAPTER Seeing is not foreseeing show us of experiences. Nothing could be further from the truth! Our senses limit us to a very small part of reality. The spectrum of what is visible is very small on the scale of electromagnetic waves. No more than a few grains of sand on the beach of frequencies. Based on this spectrum, of this thimble of sand, our brain uses our eyes to receive input about the vast majority of information that comes to us from the physical world. In any case, this is how we function. Hence the expres- sion “I believe only what I can see.” In a way, the ones who use this expression are the obscurantists of the modern world, like the clergy from the Middle Ages. This expression is so successful because we give much more credit to vision than to other senses, as we have already...seen. Aside from the fact that this expression is in itself contradictory to what we already know about scientific reality, we unconsciously superimpose it with the notion of reproducibility. We tell ourselves “if someone has seen it and if what he says is true, I will see it too.”” History screams the inconsistency of this approach at us. After all, history is irreversible. Still we hold on to it. Millions of occurrences have taken place since the dawn of time that will never happen again. We set forth untenable conditions to what real- ity must be, which is nothing like a clock. On the contrary, reality is in motion. One could even say that man has invented reproducibility to provide a better basis for predictability. In truth, the only reproducibility that nature has planned is embodied by cycles, which have the annoy- ing tendency not to cooperate with the direction of ordinary linear causality, as we will see in the analysis of the nature of time. 23 WHAT WE KNOW A PRIORI IS what our senses