It is commonly said that men are forward to believe whatever is connected with their own interest. This in common cases is true; but it is also true, that when some very great and unexpected good news is brought to us, we find it very difficult to credit it.
A Truth is the subjective development of that which is at once both new and universal. New: that which is unforeseen by the order of creation. Universal: that which can interest, rightly, every human individual, according to his pure humanity.
It's easy to play any musical instrument: all you have to do is touch the right key at the right time and the instrument will play itself.