“Perhaps we all give the best of our hearts uncritically -- to those who hardly think about us in return.”

Never Give All The Heart http://poetry.poetryx.com/poems/1545/
In The Seven Woods (1904)
Context: Never give all the heart, for love
Will hardly seem worth thinking of
To passionate women if it seem
Certain, and they never dream
That it fades out from kiss to kiss;
For everything that's lovely is
but a brief, dreamy, kind of delight.
O never give the heart outright,
For they, for all smooth lips can say,
Have given their hearts up to the play.
And who could play it well enough
If deaf and dumb and blind with love?
He that made this knows all the cost,
For he gave all his heart and lost.

Source: Sister of My Heart

Source: The Museum of Innocence

The Nemesis of Faith (1849)

Variant: Simi? What was it you told me once about families?
We have three kinds of family. Those we are born to, those who are born to us, and those we let into our hearts.
Source: Bad Moon Rising

Manuscript Found in Accra (2012), Love has always passed me by

Source: Fairy Tales

Nous ne trouvons guère de gens de bon sens, que ceux qui sont de notre avis.
Maxim 347. Compare: "'That was excellently observed,' say I when I read a passage in another where his opinion agrees with mine. When we differ, then I pronounce him to be mistaken." Jonathan Swift, Thoughts on Various Subjects.
Reflections; or Sentences and Moral Maxims (1665–1678)