The relationship between religion and science has been a focus of the demarcation problem. Somewhat related is the claim that science and religion may pursue knowledge using different methodologies. Whereas the scientific method basically relies on reason and empiricism, religion also seeks (at times, primarily) to acknowledge revelation, faith and sacredness. There is no insoluble contradiction between faith and science, because there cannot be two kinds of truth. There is only one truth to which both faith and scientific reason refer.“There exists 2 orders of knowledge” which are distinct, i.e., the order of Faith (Fides) and that of reason (ratio), and the Church recognizes that “the arts and human disciplines (...) serve one another, in their proper sphere with its proper principles and its proper method; therefore, “by recognizing this proper freedom”, the Church affirms the legitimate autonomy of the sciences.”