Note 125 — Chapter XXXV · THE IMPORTANCE OF SPACE-TIME, AND THE PRINCIPLE OF ACTION
Reading edition
We are endeavouring to explain the problem in as elementary a way as possible. A rigorous exposition, however, would compel us to state that only a certain part of constitutes the function of action. At all events, inasmuch as the superfluous part of disappears when we calculate the stationary condition, no essential change need be made in our exposition.