The aim of the paper is to show that, the hope we had and, some people still do have, that science will provide us the truth, concerning most important questions that are always bothering our minds, has now been transformed into a strong scepticism regarding the nature of science and scientific knowledge itself. In fact, the paper argues that science, instead of progressing towards the truth concerning reality, has taken the opposite direction and, deals with everyday mistakes it does. The number of mistakes, it does, are not just great but they are growing rapidly every day. This situation is keeping science busy with itself and does not leave room for it to deal with reality. Most of the scientific knowledge of one era becomes an illusion in the next one. Some of it may still be counted... as knowledge but we are not sure whether it deserves to remain as such or, we still are unable to realize that, it is not more than an illusion. From the beginning of modern time till now the situation regarding our knowledge of reality has not improved in any important respect; in fact the situation is getting worse all the time. The process of learning and studying is not enlightening us at all about the true understanding of reality; on the contrary, it only strengthens our scepticism concerning the reliability of scientific claims.