The Land of the Blue Flower by Frances Hodgson Burnett

So, as the child King grew day by day, the world seemed to grow fuller and fuller of wonders and beauties. There were the sun and the moon, the storm and the stars, the straight falling lances of rain, the springing of the growing things, the flight of the eagle, the songs and nests of small bird creatures, the changing seasons, and the work of the great brown earth giving its harvest and its fruits.

"All these wonders in one world and you a man upon it," said the Ancient One. "Hold high your head when you walk, young King, and often look upward. Never forget one marvel among them all."