Leonard Cohen was waiting for the miracle to come, and he waited half his life away. For three decades, the Jewish poet pop star studied Zen Buddhism. At 65, he finally saw small miracles. ‘There was just a certain sweetness to daily life that began asserting itself,” Cohen told The Guardian in 2001. “I remember sitting in the corner of my kitchen, which has a window overlooking the street. I saw the sunlight that shines…