The educated man has his own ignorance in this tendency to view all life in light of his own expertise. Just as a blue lens makes the yellow sun look blue, or a pink lens makes the green grass appear pink, or a yellow lens makes the blue sea seem yellow, one's field of profession gives influence to his perception of reality; and while that is harmless in some cases, in such that the sea is already blue before peering through a blue lens, wisdom is knowing when to humbly remove the specs in order to see the spectacle as it really is.