An open letter to the Hillsong worship leader who is "losing his faith"

The Hillsong worship leader Marty Sampson has announced he's "losing his faith". In an Instagram post, Sampson said, "How many preachers fall? Many. No one talks about it. How many miracles happen? Not many. No one talks about it. Why is the Bible full of contradictions? No one talks about it. How can God be love yet send 4 billion people to a place, all coz they don't believe? No one talks about it." 48 hours later, Sampson deleted the post. He then posted a collection of photographs of well known Christian apologists including William Lane Craig and John Lennox, explaining "I don’t know these men personally, but I do watch them regularly and listen to their arguments." Here, David Robertson responds by penning an open letter to Marty Sampson