"Love is a fire that burns unseen,
A wound that aches yet isn't felt,
An always discontent contentment,
A pain that rages without hurting,
A longing for nothing but to long,
A loneliness in the midst of people,
A never feeling pleased when pleased,
A passion that gains when lost in thought."
Sonnet, "Amor é fogo que arde sem se ver", line 1; translation by Richard Zenith.