There are two kinds of space, that in which one person's private experiences are situated, and that of physics, which contains other people's bodies, chairs and tables, the sun, moon and stars, not merely as reflected in our private sensations, ... The starry heavens that I see are not the remote starry heavens of astronomy, but an effect of the stars on me ; what I see is in me, not outside of me. The stars of astronomy are in physical space, which is outside of me, but which I only arrive at by inference, not through analysis of my own experience.
Source: Religion and Science, 1935, chapt. 8
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