To love for the sake of being loved is human, but to love for the sake of loving is angelic.
Sonnet 69: Those parts of thee that the world's eye doth view
by William Shakespeare
Those parts of thee that the world's eye doth view
Want nothing that the thought of hearts can mend;
All tongues, the voice of souls, give thee that due,
Utt'ring bare truth, even so as foes commend.
Thy outward thus with outward praise is crowned,
But those same tongues that give thee so thine own
In other accents do this praise confound
By seeing farther than the eye hath shown.
They look into the beauty of thy mind,
And that, in guess, they measure by thy deeds;
Then churls their thoughts, although their eyes were kind,
To thy fair flower add the rank smell of weeds.
But why thy odour matcheth not thy show,
The soil is this, that thou dost common grow.