as cited in Steven Yantis (2001) Visual Perception: Essential Readings, p. 117.
Vision, 1982
“Vision is the process of discovering from images what is present in the world, and where it is.”
Source: Vision, 1982, p. 3, cited in: M. R. Bennett, P. M. S. Hacker (2012). History of Cognitive Neuroscience.
Help us to complete the source, original and additional information
David Marr 9
British neuroscientist and psychologist 1945–1980Related quotes

The Idiot (1868–9)
Context: It wasn't the New World that mattered … Columbus died almost without seeing it; and not really knowing what he had discovered. It's life that matters, nothing but life — the process of discovering, the everlasting and perpetual process, not the discovery itself, at all. But what's the use of talking! I suspect that all I'm saying now is so like the usual commonplaces that I shall certainly be taken for a lower-form schoolboy sending in his essay on "sunrise", or they'll say perhaps that I had something to say, but that I did not know how to "explain" it. But I'll add, that there is something at the bottom of every new human thought, every thought of genius, or even every earnest thought that springs up in any brain, which can never be communicated to others, even if one were to write volumes about it and were explaining one's idea for thirty-five years; there's something left which cannot be induced to emerge from your brain, and remains with you forever; and with it you will die, without communicating to anyone perhaps the most important of your ideas. But if I too have failed to convey all that has been tormenting me for the last six months, it will, anyway, be understood that I have paid very dearly for attaining my present "last conviction." This is what I felt necessary, for certain objects of my own, to put forward in my "Explanation". However, I will continue.

"Quotes", The Educated Imagination (1963), Talk 3: Giants in Time
Source: The Romantic Generation (1995), Ch. 3 : Mountains and Song Cycles

2016, DNC Address (July 2016)
Context: I think it's fair to say, this is not your typical election. It’s not just a choice between parties or policies; the usual debates between left and right. This is a more fundamental choice — about who we are as a people, and whether we stay true to this great American experiment in self-government.
Look, we Democrats have always had plenty of differences with the Republican Party, and there’s nothing wrong with that. It’s precisely this contest of idea that pushes our country forward. But what we heard in Cleveland last week wasn’t particularly Republican — and it sure wasn’t conservative. What we heard was a deeply pessimistic vision of a country where we turn against each other, and turn away from the rest of the world. There were no serious solutions to pressing problems — just the fanning of resentment, and blame, and anger, and hate.
And that is not the America I know. The America I know is full of courage, and optimism, and ingenuity. The America I know is decent and generous.
The Divine Commodity: Discovering A Faith Beyond Consumer Christianity (2009, Zondervan)

Form in Modern Poetry(1932)

“Mastering life is the process of moving from where you are to where you want to be.”
[Jerry Jerome, Instant Inspiration: Using Quotes to Guide You to Your Goals, Instant Wisdom Publishing, February 1, 2003, 62, 097261690X]
Attributed