Roaches can actually fly. I know I've seen some of those big ones do it. But I've seen them track out across hot asphalt, stick, and die...because they refused to fly. It's in their nature to stick close to the ground and places to hide. We can "fly" if we live for the Lord and walk in His ways. But when we live according to our lower nature and sin...we live "in the gutter" and track into snares and traps that cause us to "lose our lives" rather than saving them.