According to irrationalist philosophers we can not achieve God knowledge in a rational way through experience. Human knowledge has its value but it can not be limited by scientific methods. Human reason is unable to achieve the knowledge of the truth and objective metaphysical principles. Modern thought pretend that God can be known only with irrational methods, which are expressed with the will to believe in God existence and in a personal religion experience. God idea is never objective and transcendental, but always subjective and immanent. Reason is not important in the searching of god. Belief discovers what the reason can not understand. In this paper we will deal with the consequences of irrationalism in religion. On one hand irratio...