Familiar Instructions and Evening Lectures on All the Truths of Religion Book

I borrowed this book from the library on a whim and found it actually pretty good. I haven't read his other books, and can't exactly remember much from this one, but the one thing that I think made it completely worthwhile was his notion about how we read spiritual texts and puruse spirituality to better "embrace" the mystery and not to "understand" it. I feel as if I want to KNOW what it all means, and for it to be concrete, but really... we should be interested in it to better accept and enjoy the intangibility of not knowing instead. It is in that we are able to understand.