Man and Sin by Piet Schoonenberg (1964) 2.3 TV

[Let me imagine that a train is like the single actuality produced by an intersection of two actualities.

The vertical nested form exhibits something comparable to choosing or thinking.

This corresponds to the value that a locomotive adds.

The horizontal nested form portrays something comparable to turning potential energy into work.

This correspond to the transformation of fuel (desire) into work (effort).]