The Buddha

Buddha had many interesting insights into life.
Compared to Christianity, which main argument is obey, Buddha says it's okay to doubt, including holy scriptures, logic, appearances, and religious leaders. Very different from many other religions. Rely on yourself rather than scriptures and leaders? New way of looking at things, for me at least. Then he goes into a simple saying of it it's bad for you, don't do it, if it's good for you, do it. That seems reasonable and rational. My parents have told me that since I was little. Everything in moderation.
I also like how he says "As a mother at the risk of her life watches over her only child, so let everyone cultivate a boundlessly compassionate mind toward all beings." The love a mother has for a child is a strong bond. If we look at everyone in the same love or even half of the same love that a mother has for her child, wouldn't we live in a safer and more pleasant environment?
Buddha's story about the man crossing the river with the raft is very interesting. He is comparing that crossing with the river with truths and teachings needed to overcome life's trials. Once you have passed or worked through that trial, you need to let go of that truth or teaching. Leave it there at the side of the river. This didn't make sense to me. Don't you want to keep hold of those teachings to give to others or to make sure that you don't make the same mistake again? Maybe I'm missing what he's saying.