In the first chapter of Genesis we read, "And God said, Let there be light: and there was light;" and we further read: "God divided the light from the darkness. And God called the light Day."
When the first faint gleam of this eternal day dawns in the human consciousness, it begins at once to dispel the darkness, thus dissolving the narrow boundaries of mortal concepts and bringing to view reality in the infinitude of Mind.
On page 584 of our textbook, "Science and Health with Key to the Scriptures," Mary Baker Eddy, the Discoverer and Founder of Christian Science, defines "day" as "the irradiance of Life; light, the spiritual idea of Truth and Love," and in the next paragraph she adds: "The objects of time and sense disappear in the illumination of spiritual understanding, and Mind measures time according to the good that is unfolded. This unfolding is God's day. and 'there shall be no night there.' "