In order to understand what is comprehended in the work of education, we need to consider both the nature of man and the purpose of God in creating him. We need to consider also the change in man's condition through the coming in of a knowledge of evil, and God's plan for still fulfilling His glorious purpose in the education of the human race. 

Ed. 14.4

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The world has had its great teachers, men of giant intellect and extensive research, men whose utterances have stimulated thought and opened to view vast fields of knowledge; and these men have been honored as guides and benefactors of their race; but there is One who stands higher than they. We can trace the line of the world's teachers as far back as human records extend; but the Light was before them. As the moon and the stars of our solar system shine by the reflected light of the sun, so, as far as their teaching is true, do the world's great thinkers reflect the rays of the Sun of Righteousness. Every gleam of thought, every flash of the intellect, is from the Light of the world.  Ed. 13.3

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The world has had its great teachers, men of giant intellect and extensive research, men whose utterances have stimulated thought and opened to view vast fields of knowledge; and these men have been honored as guides and benefactors of their race; but there is One who stands higher than they. We can trace the line of the world's teachers as far back as human records extend; but the Light was before them. As the moon and the stars of our solar system shine by the reflected light of the sun, so, as far as their teaching is true, do the world's great thinkers reflect the rays of the Sun of Righteousness. Every gleam of thought, every flash of the intellect, is from the Light of the world.  Ed 18.4