Many of us allow ourselves to be overwhelmed by the small worries and vexations of everyday life, clothing them with a reality quite disproportionate to their importance; we are too apt to look at them, as it were, through a powerful microscope, piling power upon power of magnification, until we have made mountains out of mole-hills, whereas if we treated them at their true value we should look at them through a telescope, in the reverse direction, when they would appear not only trivial, but would be seen to be too remote to have any material effect on our lives. In examining Nature by means of our senses we find we are so hemmed in by what we have always taken for granted and so bound down by modes of reasoning derived from what we have seen, heard, or felt in our daily life, that we are sadly hampered in our search after the truth. It is difficult to sweep the erroneous concepts aside and make a fresh start. In fact the great difficulty in studying the Reality underlying Nature is analogous to our inability to isolate and study the different sounds themselves which fall upon the ear, if our own language is being uttered, without being forced to consider the meaning we have always attached to those sounds.