“The human body has limitations; the human spirit is boundless.”
Source: Ultramarathon Man: Confessions of an All-Night Runner
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Dean Karnazes 11
American distance runner 1962Related quotes

“To confine our attention to terrestrial matters would be to limit the human spirit.”
Foreword to The Physics of Star Trek by Lawrence Krauss (2007), p. xiii http://books.google.com/books?id=NEhSpZFWiBMC&lpg=PP1&pg=PR13#v=onepage&q&f=false

“The world of reality has its limits; the world of imagination is boundless.”

As quoted in Believer Magazine http://www.believermag.com/exclusives/?read=interview_p-orridge_rushkoff "Douglas Rushkoff in conversation with Genesis Breyer P-Orridge”.

Introductory
A Treatise on Man and the Development of His Faculties (1842)
Context: It is a remarkable fact in the history of science, that the more extended human knowledge has become, the more limited human power, in that respect, has constantly appeared. This globe, of which man imagines the haughty possessor, becomes, in the eyes of astronomer, merely a grain of dust floating in immensity of space: an earthquake, a tempest, an inundation, may destroy in an instant an entire people, or ruin the labours of twenty ages.... But if each step in the career of science thus gradually diminishes his importance, his pride has a compensation in the greater idea of his intellectual power, by which he has been enabled to perceive those laws which seem to be, by their nature, placed for ever beyond his grasp.

The Notebooks of Leonardo da Vinci (1883), II Linear Perspective
Source: Dictionary of Burning Words of Brilliant Writers (1895), P. 519.

“The human body and the universe
grew from this, not this
from the universe and the human body.”
"This We Have Now" in Ch. 25 : Majesty. p. 262
The Essential Rumi (1995)
Context: This
that we are now
created the body, cell by cell,
like bees building a honeycomb. The human body and the universe
grew from this, not this
from the universe and the human body.