An eminent musician and composer, the late Dr. Ritter, told me that reading "Leaves of Grass" excited him to composition as no other poetry did. Tennyson left him passive and cold, but Whitman set his fingers in motion at once; he was so fruitful in themes, so suggestive of new harmonies and melodies. He gave the hints, and left his reader to follow them up. This is exactly what Whitman wanted to do. It defines his attitude toward poetry, towards philosophy, towards religion,--to suggest and set going, to arouse unanswerable questions, and to brace you to meet them; to bring the materials of poetry, if you will have it so, and leave you to make the poem; to start trains of thought, and leave you to pursue the flight alone. Not a thinker, several critics have urged; no, but the cause of thought in others to an unwonted degree. "Whether you agree with him or not," says an Australian essayist, "he will sting you into such an anguish of thought as must in the end be beneficial." It matters little to him whether or not you agree with him; what is important is, that you should think the matter out for yourself. He purposely avoids hemming you in by his conclusions; he would lead you in no direction but your own. "Once more I charge you give play to your self. I charge you leave all free, as I have left all free." No thought, no philosophy, no music, no poetry, in his pages; no, it is all character, impulse, emotion, suggestion. But the true reader of him experiences all these things: he finds in his pages, if he knows how to look for it, a profound metaphysic, a profound ethic, a profound æsthetic; a theory of art and poetry which is never stated, but only hinted or suggested, and which is much more robust and vital than what we are used to; a theory of good and evil; a view of character and conduct; a theory of the state and of politics, of the relation of the sexes, etc., to give ample food for thought and speculation. The Hegelian philosophy is in the "Leaves" as vital as the red corpuscles in the blood, so much is implied that is not stated, but only suggested, as in Nature herself. The really vast erudition of the work is adroitly concealed, hidden like its philosophy, as a tree hides its roots. Readers should not need to be told that, in the region of art as of religion, mentality is not first, but spirituality, personality, imagination; and that we do not expect a poet's thoughts to lie upon his pages like boulders in the field, but rather to show their presence like elements in the soil. "Love-buds, put before you and within you, whoever you are, Buds to be unfolded on the old terms, If you bring the warmth of the sun to them, they will open, and bring form, color, perfume to you, If you become the aliment and the wet, they will become flowers, fruits, tall branches and trees."