Quote by C.S. Lewis
Humans are amphibians...half spirit and half animal...as spirits they belong to the eternal world, but as animals they inhabit time. This means that while their spirit can be directed to an eternal object, their bodies, passions, and imaginations are in continual change, for to be in time, means to change. Their nearest approach to constancy, therefore, is undulation--the repeated return to a level from which they repeatedly fall back, a series of troughs and peaks.
Summary
This quote by C.S. Lewis highlights the dual nature of humans as both spiritual beings connected to the eternal world and as physical beings bound by time. It suggests that while our spirits can strive for something everlasting, our physical bodies, emotions, and imaginations are subject to constant change. The quote describes the human experience as a continuous fluctuation between moments of stability and moments of setback, with no fixed state of constancy. Lewis refers to this fluctuation as "undulation," indicating that humans oscillate between periods of stability and instability throughout their lives.
By C.S. Lewis