Mystery disappears because you start having the idea that you know. When you know, how can there be mystery? Mystery is possible only when you don’t know.
And remember, man has not known a thing! All that we have gathered is just rubbish. The ultimate remains beyond grasp. What we have gathered are only facts, truth remains untouched by our efforts. And that is the experience not only of Buddha, Krishna, Krishnamurti and Ramana; that is the experience even of Edison, Newton, Albert Einstein. That is the experience of poets, painters, dancers. All the great intelligences of the world – they may be mystics, they may be poets, they may be scientists – are in absolute agreement about one thing: that the more we know, the more we understand that life is an absolute mystery. Our knowledge does not destroy its mystery. It is only stupid people who think that because they know a little bit, now there is no more mystery in life. It is only the mediocre mind that becomes too attached to knowledge; the intelligent mind remains above knowledge. He uses it, certainly uses it – it is useful, it is utilitarian — but knows perfectly well that all that is true is hidden, remains hidden. We can go on knowing and knowing, but God remains unexhausted.
The Heart Sutra, Ch 3 (excerpt)