He doesn't know where he is, or where he's going. He'll never do anything, and he'll never amount to anything. It seems almost a recognition that within his own work there are insufficient answers. There aren't any good, brave causes left. Such a statement could be read as the voice of pessimistic nihilism.
Active indignation is linked up with hope.
In Celine's book there is no hope. That is clearly not the case here. Jimmy yearns for passion, and clings to the idea of it. There is a vision, however confused, of the possibilities of human existence. What makes Jimmy's statement so interesting is precisely the historical context in which it occurs.