In October, 1632, Galileo Galillei was forced to abjure of his physical theories. But the benefit for the humanity was already done. After Galileo the human beings were free to doubt everything that was said to them, everything that was forced into their minds. After Galileo, every affirmation of -any- human being, be him a pope or any other authority, could be subjected to the test of experiment. Finished was “it is so, because it is I who says it”.
Galileo founded science. Science is the human endeavour that allows every person to look for him- or herself after the truth in the world, without having to rely on affirmations pronouced by others.
Each one of us is free to subject any affirmation to the very strong test of experiment. If I say that two balls, of exactly the same diameter and very similar surface texture, left to fall from a balcony at the same time, arrive at the same time at the street below, although one of them weighs 10 times more than the other, nobody is forced to believe me: Everyone can perform the same experiment for herself. If I say that the acceleration of any object in free fall at the Earth surface is 9.81 m/s², nobody has to believe me, but every one can test my affirmation.
If I say that by praying to some saint figure in a cave in the mountains I am able to cure cancer in human beings, everybody in the world can test my affirmation. If I say that I see ghosts, everyone in the world can test what I say.
But human society, freed by science of being forced to follow the words of anyone that proclames that she is in possesion of the truth, continues to lower their necks to the yoke, just by being afraid, or too lazy, to think by themselves. Hundreds of thousands congregate in places around the world to be told what to believe, or to protest in mass what other persons have said.
After having tried the sweet taste of freedom, many a person chooses however to follow blindly what others say instead of what he can test by himself.
When science opens all the world to the mind of everyone, -of everyone-, why are so many afraid of taking the challenge? Why to follow blindly when you can discover the world, and doubt it, by yourself?