Just as the pious man prays without speaking a word and the Almighty hearkens unto him, so the artist with true feelings paints and the sensitive man understands and recognizes it.

-Friedrich, Caspar David
Quoted in S Hinz Caspar David Friedrich in Briefen und Bekenntnissen (1968).

A sensitive boy's humiliations may be very good fun for ordinary thick-skinned grown-ups; but to the boy himself theyareso acute, so ignominious, that he cannot confess themöcannot but deny them passionately.

-Shaw, George Bernard
  JohnTanner. Man and Superman, act1.

A Sensitive Plant in a garden grew. 785

-Shelley, Percy Bysshe
  'The Sensitive Plant', pt.1, l.1.