Violets, shy violets!
How many hearts with you compare!
Who hide themselves in thickest green,
And thence, unseen,
Ravish the enraptured air
With sweetness, dewy fresh and rare!

Violets, shy violets!
Human hearts to me shall be
Viewless violets in the grass,
And as I pass,
Odours and sweet imagery
Will wait on mine and gladden me!

George Meredith

http://www.poemhunter.com/poem/violets-6/