Keynes for beginners

If the Treasury were to fill old bottles with banknotes, bury them at suitable depths in disused coal mines which are then filled up to the surface with town rubbish, and leave it private enterprise on well tried principles of laissez-faire to dig the notes up again (the right to do so being obtained, of course, by tendering for leases of the note-bearing territory), there need be no more unemployment and, with the help of the repercussions, the real income of the community, and its capital wealth also, would probably become a good deal greater than it actually is.
• Book 3, Chapter 10, Section 6, p. 129

• Two pyramids, two masses for the dead, are twice as good as one; but not so two railways from London to York.
• Book 3, Chapter 10, Section 6, p. 131

Pyramid-building, earthquakes, even wars may serve to increase wealth, 
• Book 3, Chapter 10, Section 6

But whilst there may be intrinsic reasons for the scarcity of land, there are no intrinsic reasons for the scarcity of capital.
• Book 6, Chapter 24, Section 2, p. 376