Here's some background quoted from the site:
For eight years, Daniel Epstein, a Marketing Director at one of the world’s largest corporations, Procter & Gamble, has been travelling the world for business and for faith. Motivated by his own search to fill the "God-sized hole" in his life, he did not know where it would lead. He felt that if he did not develop some type of spiritual faith he would die. Born and raised a Jew, Daniel’s challenges with relationships, work, and "life" forced him at age 36 to get on his knees and pray to a God he did not know, a higher power not specific to either his own Judaism or any religion, and ask for help. In order to keep his new found sense of faith alive and to gain from the experience of others, Daniel created a spiritual exercise out of interviewing people around the world about the role of faith in their lives. As a photographer, Daniel also captured a moment with each person in a black and white portrait meant to evoke their true spirit.
Portraits in Faith is not about religion. It is about documenting the role of spiritual experience inside and outside of formal religion, expected and unexpected, told in people’s own words, and brought to life with video and photography. The message of Portraits In Faith is that despite all the negative press on faith in the world today, faith is a powerful healer, transformer, and changer of lives. The overriding message is that however one calls God (Jesus, Buddha, Allah, Higher Power, The Divine, Creative Intelligence…) there is a greater force that connects us all and it is good for each person to find a path that leads to a faith that works for them.