When I was 18 ish, yikes 40 years ago!!
I joined a spiritual meditation group. It was Tantra so it had a certain appeal to a young bloke back then
It was really good, I got a lot out of it. Our Guru was a wonderful tiny Indian lady named Dada, Nalinalissa. She was so wise.
After a few months I stayed back after lessons one night and asked her a question to something that was troubling me.
I asked her, "With the greatest respect, I believe all you have taught me, the evidence of the truth is in what we practice, but, even so, if we were to gather a Christian Priest, A Muslim cleric, a Hindu and others here, they would each have a valid but different Truth, why is your/our truth more valid than theirs?"
Honestly, I expected a scolding, but she was delighted with the question and told me so, she was positively gleeful.
She said "It is a great question and here is my answer."
She said that all the religions and philosophy's in the world and the people who follow them are like people crossing a great river. She said some people cross in great big boats with lights shining in the water, gathering up with them all they can save, others are in small boats with closed windows, madly rowing ignoreing all around trying to get to the other side. Others are people on there own, just swimming to stay alive, floundering not noticing any one else.
But then she smiled and said, but in the end, there is only one jetty on the other side.
She said life is a journey, you have to learn as much as you can, taking with you what makes sense to you.
Throwing away that which makes no sense, and holding on to what does.
But in the end, we all end up in the same reality.
I never forgot that, and it is why my personal belief has bits of so many philosophy's.