The conditions of a solitary bird are five:

>>The first, that it flies to the highest point;
>>The second, that it does not suffer for company, not even of its own kind;
>>The third, that it aims its beak to the skies;
>>The fourth, that it does not have a definite color;
>>The fifth, that it sings very softly.

- St. John of the Cross, Dichos de Luz y Amor.