Gravity is a most appropriate exemplar.

title excerpt: Renselle, Doug. March 23, 2006.Topic 17: Pages 90-97: A Review by Doug Renselle of Henri Louis Bergson's 'Time and Free Will,' 1st translated English version published in 1911.:. Retrieved January 5, 2007 from http://www.quantonics.com/Bergsons_Time_and_Free_Will_Topic_17.html

Doug Renselle