Read it anyway. That's my recommendation. The first part of the book is so good, so beautiful and so descriptive of Jesus as a real person that it will provoke much thought and, I believe, lead you to deeper affection of and obedience. It's the last part, where John tries to show a person how to relate to Jesus, that needs to be read with discernment. There are some real nuggets here as well, but you'll need a shovel to dig them out at times.