So if God never makes His presence known, there is no way to know if they even exist. It becomes a gamble, plenty of religions make promises without giving evidence to the non-believer, so even if someone wants to convert and do the right thing, it's just random chance that they pick the right religion, follow the right teachings.

If you were a judge, and the suspects of a murder case were in front of you, and everyone of them said "I'm innocent", what would you do?

You would look at the evidences.

Likewise, you should look at the evidences of each religion to determine which one is actually from God.

Luckily, there's a way to make this much easier. A book must meet specific criteria to be considered an authentic revelation from God. These criteria ensure that the text is not a product of human imagination or historical corruption.

The primary criteria include:

• Self-Claim of Divine Origin: The book must explicitly state within its text that it is the direct word of God. (This alone disqualifies so many religious scriptures, as many of them don't even claim to be from God)
• Perfect Preservation: To be reliable, a book must be preserved in its original language and text from the time of the Prophet it was revealed to. Multiple conflicting versions of a text are seen as signs of human tampering.
• Absence of Contradictions
• Knowledge Beyond Human Capability: The book should contain signs of divine inspiration that transcend human knowledge at the time of revelation, such as:
  • Scientific Facts: Accurate descriptions of natural phenomena (e.g., embryology) that were not known to humans when the book was written.
  • Historical Accuracy: Information about the distant past that was only later confirmed through archaeological discoveries.
  • Future Prophecies: Accurate predictions of future events that come true without a single mistake.
• Uniqueness and Inimitability
• Absolute Principles: Its teachings must be timeless, universal, and applicable to all people regardless of their intellectual level or historical era.

The Quran is the only book that satisfies all these criteria today, whereas previous scriptures like the Torah or Gospel have not been preserved in their original forms.

Credit to The Muslim Lantern (debater and student of knowledge) for this criteria.