It is important to remember that events now long in the past were once in the future.
F. W. Maitland (1850-1906) English legal historian and jurist [Frederic William Maitland]
(Attributed)
A favorite saying of A. J. P. Taylor's which he used repeatedly in his writings, attributing it to Maitland. It is sometimes erroneously attributed to Taylor. Variant: "It is very had to remember that events now long in the past were once in the future"