But the majestic river floated on, Out of the mist and hum of that low land, Into the frosty starlight.

-Arnold, Matthew
  Poems:  A New Edition,'Sohrab and Rustum', l.875^7.

I live not in myself, but I become Portion of that around me; and to me, High mountains are a feeling, but the hum Of human cities torture.

-Rochdale
^18  Childe Harold's Pilgrimage, canto 3, stanza 72.

Now air is hushed, save where the weak-eyed bat With short shrill shriek flits by on leathern wing, Or where the beetle winds His small but sullen horn, As oft he rises midst the twilight path, Against the pilgrim borne in heedless hum.

-Collins,William
  Odes on Several Descriptive and  Allegoric Subjects,'Ode to Evening', l.9^14.

   I can hum a fugue of which I've heard the music's din afore, And whistle all the airs from that infernal nonsense Pinafore.

-Gilbert, Sir W(illiam) S(chwenck)
   The Major-General's song, The Pirates of Penzance, act1.

The force that propels the human spirit on the clear way forward and upward is the abstract spirit.

-Kandinsky,Wassily
  'On the Question of Form', in Blaue Reiter Almanac.