In describing the forming of blossom in the plant as the climax of the 'spirit' active in it, Ruskin says: 'Its (the plant's) form becomes invested with aspects that are chiefly delightful to our own human passions; namely, first, with the loveliest outlines of shape and, secondly, with the most brilliant phases of the primary colours, blue, yellow, red or white, the unison of all; and to make it more strange, this time of peculiar and perfect glory is associated with relations of the plants or blossoms to each other, correspondent to the joy of love in human creatures and having the same object in the continuance of the race.'²