There was a small problem; from the billions of stars, seven had an apparently chaotic movement. The Ancient Greeks have called them rambling stars or planets. The European spirit could not accept this. Nikolaus Copernicus published in the last year of his life the heliocentric theory of the Universe. It was for the first time when the European spirit and Christian religion clashed. Giordano Bruno, a great European, has payed with his death the sustaining of the idea of the Earth not being the center of the Universe, and Galileo Galilei had to be humiliated to survive. But, surprise! Kepler verified Copernicus' theory and discovered that it is wrong (the positions calculated for the planets did not correspond to the experimental data). Kepler was not discouraged and he discovered that, if the orbits were to be ellyptical, and not circular as said by Copernicus, then, the calculations could be compatible with the experimental data. Later, Newton was able to find the explanation of this situation. The problem was solved beyond any doubt in the favour of the European spirit. After many centuries, the Christian Church admitted officially the situation and rehabilitated Galileo Galilei, but not Giordano Bruno. The above considerations suggest the essence of the European spirit: liberalism and tolerance, the desire for knowledge and the tendency to adventure. We will say a few words about a new issue. It appears now, that a European Constitution is to be written. The problem is associated with the protests of the Christian Church generated by the non-inclusion in the Constitution draft of a phrase on the Christian origin of the European civilisation. As we have seen above, Europeans have created Christianity for Europeans. In spite of this, in many cases the European spirit clashed violently with the Christian spirit. The main reason is connected to the dynamism associated with the European spirit, which cannot accept an invariant model (religion). The European spirit always was victorious, but the Christian Church did not succeed to evolve fast enough to sustain always the European spirit. The Church doesn't seem to have learned anything along the centuries, if, even nowadays, it opposes the European spirit in problems like the same-sex marriages, abortion or accepting women as priests. Thus, there is, up to a point, a justification to the decision not to include in the European Constitution the reference to Christianity. We need to note that accepting same-sex marriages is not, in principle, a good thing, and I believe that many Europeans have this point of view. However, the European liberal and tolerant spirit states that, passing over any pros and cons, there should not exist, in principle, any authority to oppose to the wish of the people to search and experiment new ways of life together. European homosexuals are Europeans, and have the right to live their life as they consider it right.