Fail to honor people, They fail to honor you; But of a good leader, who talks little, When his work is done, his aims fulfilled, They will all say, We did this ourselves.

This is actually a translation of a statement by Lao Zi from the Tao Te Ching (Daodejing). Patton may have used a similar or identical expression, perhaps quoting the book. - Speech to the Third Army (1944)