Many books have been written about how to love one another better. As the author says, this is not one of those books. Instead, it deals with the wound to love itself: our ability to trust that love is available. John Welwood is clearly someone who has done a lot of work on himself and knows what he is talking about, but he wears this lightly. He distinguishes absolute love and what he calls relative love - the love that is available to us from other people in this world of conditions - with great clarity. I find this a much more helpful language than that of conditional and unconditional love.
He counsels us not to try to let go of our wounds in a mistaken understanding of Buddhism, but to feel the depth of our longing for love. He explains not just why this can immediately be healing (in the famous words of Kabir quoted above) but also how, with exercises that radiate off the page.
John Welwood writes simply, accessibly, and concisely, but with wisdom and depth. I read a lot of books in these fields, and I can honestly say this is one of the best books I have read. Almost every line is quoteable. I recommend it unreservedly.