The end of an action is the intended outcome of the action and not a mere by-product of the action, and the end' s value is thus the only reason for the action
So while it is true that not every end' s value will justify any means, and even, perhaps, that there is no end whose value will justify every means, it is clear that nothing will justify a means except an end' s value
Only the value of the by-products of an action can justify that action.