This paper focuses on the third chapter of Fides et ratio, entitled Intellego ut credam This sentence is usually connected with the preambula fidei, truths which are supposed to prepare human mind to receive the gift of faith. But in this case, Pope John Paul II develops this sentence in a different, more existential way according to which the real preambula fidei are not so much a set of truths as the real man who seeks the truth with his entire life. This interpretation remarks the practical dimmension of the relationship between man and truth.