The scientist takes off from the manifold observations of predecessors
, and shows his intelligence, if any, by his ability to discriminate b
etween the important and the negligible, by selecting here and there t
he significant stepping stones that will lead across the difficulties
to new understanding. The one who places the last stone and steps acro
ss to the terra firma of accomplished discovery gets all the credit. O
nly the initiated know and honor those whose patient integrity and dev
otion to exact observation have made the last step possible (Zinsser,
1940).