“The only way back is the way forward.”
“When your back is to the wall and you are facing fear head on, the only way is forward and through it.”
“And, when you can't go back, you have to worry only about the best way of moving forward.”
“There are many ways of going forward, but only one way of standing still.”
“Moving forward is the only way to survive.”
“The only way was forward, whatever lay at the end.”