Praise life, it deserves praise, but the praise of life That forgets the pain is a pebble Ruttled in dry ground.

-Jeffers, (John) Robinson
  The Double Axe and Other Poems.

I know not what I mayappear to the world, but to myself I seem to have been only like a boy playing on the sea shore, and diverting myself in now and then finding a smoother pebble or a prettier shell than ordinary, whilst the great ocean of truth lay all undiscovered before me.

-Newton, Sir Isaac
Quoted in D Brewster (ed) Memoirs of Newton (1855), vol.2, ch.27.