How do you know your religion is true?
1) Holy Book
Almost every religion claims their holy book to be holy and true. How do you know your holy book is the true one among the many holy books out there in the world?
2) Miracles and Wonders
Every religion has that as well. I had seen and heard of miracles and wonders in many religions.
3) Born in your religion
Well, how are you so sure that the religion you are born in is true? There are many, many people who are born in other religions who also believe their religions to be true.
4) Personal Experience
Every religion has some sorts of personal experiences in them. How are you so sure your personal experience is better than those encountered by people of other religions?
5) I will add on when I can think of more ideas.