"I think I hit the bottom when my wife left me while I was on the road"

In this quote, Brian Welch is reviewing a difficult time in his life when his spouse left him while he was away on trip. Making use of the expression "struck the bottom" recommends that this event was a low point for him, perhaps the lowest he had actually ever felt. It could also imply that he felt like he had struck rock bottom and had nowhere else to go but up. The fact that his other half left him while he was on the roadway includes another layer of discomfort and loneliness to the scenario. In general, this quote conveys a sense of deep unhappiness and battle, however likewise hints at the possibility of growth and strength.