I love this great Brazilian writer Machado de Assis. 

Here, we learn about his books from school onwards. In his book, he shows us how the human nature can be insane and passionate about life's trivialities. 

Oi Jomara! Dois pontos, espero que ajudem...

"Since" só pode ser usado quando refere a um ponto de tempo fixo (uma data ou um acontecimento ao qual você poderia dar uma data). Por exemplo: I've been living in Europe since 2009. I've been studying English since last year. I've loved her since the day I met her. I've been fascinated by Brazil since my first holiday there. Nesta frase, você poderia usar "since" se você falasse de seus próprios estudos: I've been learning about his books since I was in school, já que "I was in school" é um tempo fixo, pela sua foto linda vou adivinhar que isso foi bem recente, talvez nos anos de 2000 :) Mas aqui, você tá falando em geral, a gente aprende sobre o Machado de Assis na escola, e a época da escola é diferente para cada um de nós. Para mim, a escola era nos anos de 90, para outro pode ter sido nos anos de 70. Assim, não tem data fixa e tem que usar "from____on" ou "from______onwards". 

the human nature: substantivos abstratos quase nunca têm o 'the' em inglês. Escrevi sobre isso aqui: http://www.italki.com/entry/376559

Can you post the poem in Portuguese? 

A poem by Machado de Assis. 

The first glory is the repair of mistakes
The occasions makes the revolutions
Love is the king of youth and the tyrant of the old men
Love is duplicated selfishness 
Nothing is lost by appearing bad (acho melhor aqui: evil), you gain enough being so as much as if you were
Also the Pain also has their its hipocrisy hypocrisies 
The Fear is a prejudice of the nerves. And the prejudice unravels - disrupt just a simple reflection is enough.
Sleep is an internal way to die inside
Time is a rodent mouse rat of things that decreases or changes them in the sense of order to giving them another aspect.
We kill the time -but the time will bury us
Love repelled is multiplied love.
All of Of all human things, the only one who that has the end in itself is the art.
The Destiny, as the playwrights, does not announce the adventures and denouement (or upshot?)
Does not love the same woman twice.
The Vanity is a beginning (princípio pode ser beginning (início) ou principle, acho que aqui é principle) of corruption
There is no public joy worth a good particular joy.
Tolerate with a lot of patience the liver painful of others Someone else's pain in the liver is tolerated very patiently
The Fortune exchanges, sometimes, the nature's calculations.

That was really hard!! Caso não seja claro o porque das correções, pode perguntar e vou tentar explicar!

Brazilian Poem

Hello,

I live this great brazilian writer Machado de Assis.

Here, we learn about his books since school age. On his book, he's show us how the human nature can be insane and passionate about life's trivialities.

A poem by Machado de Assis.

The first glory is the repair of mistakes
The occasions makes the revolutions
Love is the king of youngs and the tyrant of the old men
Love is duplicated selfish
Nothing is lost being bad, gain enough being so
Also the pain has their hipocrisy (or cant?)
The fear is a prejudice of the nervous. And the prejudice disrupt just a simply reflection.
Sleep is a way to die inside
Time is a rodent mouse of things that decreases or changes the order to give them another aspect.
We kill the time -but the time will bury us
Love repelled is multiplied love.
All of human things, the only who has the end itself is the art.
The destiny as the playwrights, does not announce the adventures and denouement (or upshot?)
Does not love the same woman twice.
The vanity is beginning of corruption
There is no public joy worth a good particular joy.
Tolerate with a lot of patience the liver painful of others
The fortune exchange, sometimes, the nature calculations.

Very wrong! haha

Brazilian Poem

Hello,

I live this great brazilian writer Machado de Assis.

Here, we learn about his books since school age. On his book, he's show us how the human nature can be insane and passionate about life's trivialities.

A poem by Machado de Assis.

The first glory is the repair of mistakes
The occasions makes the revolutions
Love is the king of youngs and the tyrant of the old men
Love is duplicated selfish
Nothing is lost being bad, gain enough being so
Also the pain has their hipocrisy (or cant?)
The fear is a prejudice of the nervous. And the prejudice disrupt just a simply reflection.
Sleep is a way to die inside
Time is a rodent mouse of things that decreases or changes the order to give them another aspect.
We kill the time -but the time will bury us
Love repelled is multiplied love.
All of human things, the only who has the end itself is the art.
The destiny as the playwrights, does not announce the adventures and denouement (or upshot?)
Does not love the same woman twice.
The vanity is beginning of corruption
There is no public joy worth a good particular joy.
Tolerate with a lot of patience the liver painful of others
The fortune exchange, sometimes, the nature calculations.

Here portuguese poem:

A primeira glória é a reparação dos erros.

As ocasiões fazem as revoluções.

O amor é o rei dos moços e o tirano dos velhos.

O amor é o egoísmo duplicado.

Não se perde nada em parecer mau - ganha-se tanto como em sê-lo.

Também a dor tem suas hipocrisias.

O medo é um preconceito dos nervos. E um preconceito, desfaz-se - basta a simples reflexão.

Dormir é um modo interino de morrer.

O tempo é um rato roedor das coisas, que as diminui ou altera no sentido de lhes dar outro aspecto.

Matamos o tempo - o tempo nos enterra.

Amor repelido é amor multiplicado.

De todas as coisas humanas, a única que tem o fim em si mesma é a arte.

O destino, como os dramaturgos, não anuncia as peripécias nem o desfecho.

Não se ama duas vezes a mesma mulher.

A vaidade é um princípio de corrupção.

Não há alegria pública que valha uma boa alegria particular.

Suporta-se com muita paciência a dor no fígado alheio.

A fortuna troca, ás vezes, os cálculos da natureza.

Very wrong! haha