Our worldview determines our perception of reality and thus shapes our attitude to life and the way we live. If our worldview adequately reflects reality, we can lead an authentic and meaningful life that we will later look back on with satisfaction. A mature worldview is much more than the accumulation of facts and experiences. Whereas in the past there was primarily a lack of scientific insight, today it is above all the immense flood of information and opinions that obscures our view of essential knowledge. It is therefore not surprising that people's views sometimes differ considerably with regard to fundamental questions of life.The thesis of this book is that in this age it is possible for the first time to obtain objectively convincing answers to the great philosophical questions of life. However, for this we have to draw on two equal sources of knowledge, which in the last centuries were rather regarded as adversaries: science and religion. In their respective updated forms, they are the key to separating truth from error and to assembling various worldview fragments into a coherent overall picture. If science and faith pull together in a mature way, great insights and undreamt-of connections open up.This book provides an easy-to-read, albeit quite comprehensive, introduction to the profound principle of the unity of science and religion. After examining what distinguishes modern science and true faith, it explains how both areas of knowledge are interrelated by their very nature and work constructively together. Building on this methodological foundation, essential philosophical concepts are explained in the light of current scientific and religious knowledge, which should not be missing as necessary pillars in any mature worldview.