The telescope, the microscope, the scalpel, the retort and alembic cannot go beyond the physical, although they may arrive at subtler and subtler truths about the physical. If then we confine ourselves to what the senses and their physical aids reveal to us and refuse from the beginning to admit any other reality or any other means of knowledge, we are obliged to conclude nothing is real except the physical and that there is no Self in us or in the universe, no God within and without, no ourselves even except this aggregate of brain, nerves and body. But this we are only obliged to conclude because we have assumed it firmly from the beginning and therefore cannot but circle round to our original assumption. If, then, there is a Self, a Reality not oblivious to the senses, it must be by other means than those of physical Science that it is to be sought and known. The intellect is not that means.
The Illimitable they measured with number's rods
And traced the last formula of limited things,
In transparent systems bodied termless truths,
The Timeless made accountable to Time
And valued the incommensurable Supreme.
To park and hedge the ungrasped infinitudes
They erected absolute walls of thought and speech
And made a vacuum to hold the One.