No epoch is homogeneous; whatever you may have assigned as the dominant note of a considerable period, it will always be possible to produce men, and… - Alfred North Whitehead

I would not go so far as to say that to construct a history of thought without a profound study of the mathematical ideas of successive epochs is like omitting Hamlet from the play which is named after him. That would be claiming too much. But it is certainly analogous to cutting out the part of Ophelia. This simile is singularly exact. For Ophelia is quite essential to the play, she is very charming-and a little mad. Let us grant that the pursuit of mathematics is a divine madness of the human spirit, a refuge from the goading urgency of contingent happenings.

The word “experience” is one of the most deceitful in philosophy. Its adequate discussion would be the topic for a treatise. I can only indicate those elements in my analysis of it which are relevant to the present train of thought.

It is a false dichotomy to think of Nature and Man. Mankind is a factor in Nature which exhibits in its most intense form the plasticity of Nature.