Gazizza.Net

The relationship between faith and reason is a serious challenge for the present prevailing culture in the Western world, and it is precisely for this reason that our beloved John Paul II wrote an encyclical, which was entitled precisely "Fides et Ratio" -- "Faith and Reason." I also took up this argument recently, in the address to the University of Regensburg.

In reality, the modern development of the sciences brings countless positive effects, which must always be acknowledged. At the same time, however, it must be admitted that the tendency to consider true only that which can be experienced constitutes a limitation for human reason and produces a terrible schizophrenia, evident to all, because of which rationalism and materialism, and hypertechnology and unbridled instincts, coexist.
...
Faith implies reason and perfects it, and reason, illuminated by faith, finds the strength to rise to knowledge of God and of spiritual realities. Human reason loses nothing when it is open to the contents of faith; what is more, the latter calls for its free and conscious adherence.

Faith without reason is superstition and reason without faith has no meaning. You need both to truly understand reality.

Read the whole thing