Infinity is a floorless room without walls or ceiling. – Author Unknown

Anyone who cannot cope with mathematics is not fully human. At best he is a tolerable subhuman who has learned to wear shoes, bathe, and not make messes in the house. – Robert Heinlein, Time Enough for Love

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. – Alfred North Whitehead