It's a rule of life that we can, and should, learn from everyone.
There are solemn and serious things we can learn from quacks and
crooks, there are philosophies taught us by fools, there are lessons
in faithfulness and justice brought to us by chance and by those we
chance to meet. Everything is in everything.
In certain particularly lucid moments of contemplation, like those of
early afternoon when I observantly wander through the streets, each
person brings me a novelty, each building teaches me something new,
each placard has a message for me.
My silent stroll is a continual conversation, and all of us - men,
buildings, stones, placards and sky - are a huge friendly crowd,
elbowing each other with words in the great procession of Destiny.
Fernando Pessoa, The Book of Disquiet