"La verdad es que la religión tal como la hablamos solo se vuelve coherente por la tonta y constante farsa de las fes contendientes."

Simplified Meaning:

Religion makes sense to people because there are always different groups arguing about which belief is the right one. Imagine a street with several food stalls, each claiming to sell the best snack. The competition and noise from the vendors shouting about their food make the street lively and exciting. Similarly, different religions each claim to be the true faith, and this ongoing debate keeps people interested and involved in religion. If these stalls were not there, the street would be quiet, and people might not be as excited to visit. The same goes for religion: if there weren't different beliefs arguing their points, people might lose interest. Someone can use this idea to understand why there are so many different religions and why they all insist they are correct. It's the ongoing discussions and disputes that keep the importance of religion alive and engaging for people.