How quietly, slowly, and surely was the evolution of that older period carried out. One simple proportion was maintained between art and the universal life of culture. Customs, views of life and art, were so intimately bound up together, that the knowledge of the age in general naturally comprises that of art. Standing before some old altar-piece of the school of Cologne, it is as though one were watching in some broad high dome; everything is quiet all round, and the august figures in the picture lead their calm, grave existence in illustrious grandeur. The message of Christianity, "My kingdom is not of this world," meets in art, too, with a clear expression. Humility and devotion are joined together, making for a refinement in the feeling of life that is unsurpassed in its hieratic tenderness and gracious innocence. In the fifteenth century, the age of discoveries, a new spirit entered the world. Commerce and navigation discovered new worlds, painting discovered life. The human spirit grew freer and more joyous; it was no longer satisfied with yearning for the other world alone, it felt itself at home also in this world, in the glory of the earth. Pictures, too, were inspired with some of those joyous perceptions with which the citizens of the fifteenth century issued from their narrow walls out under God's free heaven, something of that Easter Day mood in _Faust_. People still went on painting Madonnas and saints, subjects of a religion which had spread from the far East over the whole West; but with the severe simplicity of the heavenly, there was universal awakening of all the charm and roguery and energy of the earthly. It is the first virginal contact of the spirit with nature. On men's works there rests the first morning-dew of spiritual life; they remind one of woodlands in spring: Botticelli, Van Eyck, Schongauer.