Mario,
Religion offers most people of their respective faith a great deal of comfort and a means to express their spiritual nature. Truth is philosophically undefinable and scientifically impossible to obtain, therefore the meaning of truth cannot be 'objective' as you suggest but entails a great deal of subjectivity. Who decides what is true? The majority: which majority?, the winners of a war: which war?, scientists: of which bygone era?, philosophers: which one do we ask?
Ultimately 'truth' is at least partially a subjective quality that we try to hit each other over the head with in attempting to prove who is right. In matters of religion what is important is the joy that this religion gives you and the hope that it instills. Beyond that we can quibble about what the historical or scientific or philosophical implications of a particular belief of a religion, but the end all and be all is that religion is much bigger than those details and any appeal to 'truth' is simply naive and unprovable.
We can say that a religion or its practices or beliefs are irrational, but at the end of the day each individual should decide what that religion does for them. If they see those qualities as important and intrinsic to their life, then its their life and they should enjoy it how they prefer.
Warm regards, Harv |