The different faiths are somehow analogous to rivers. They all flow back to the ocean. The more ancient ones have a lot of twists and turns, and the water is sometimes a bit murky, but you can reach the same destination traveling on any of them.

The spiritual essence of the world religions is timeless, but the less important rites, rituals, and dietary rules change. On the practical side, the conditions of the world and humanity also change, as does our knowledge base, so it makes sense that a revelation would reflect that too.

Anyway, I think you would like Khalil Gibran, he was a painter who also painted with words.