You have never seen a sinner, only dreamt of him. A "full human being" differs extraordinarily whether you ask Diogenes, Zhu Xi or Maximos the Confessor it is an idiosyncratic ideal through and through.
How many lifes have Goethe not enriched, how much literature has he not inspired? Is he not, dare I say, in his literary influence, more alturistic that you could ever hope to become?
Goethe, like all poets, theologians and philosophers are there to be plundered for your own enjoyment and personal betterment "Es wird ein Mensch gemacht", as the good Dr. Faust said. His writings, or any other for that matter of sake, aren't a universal mold you have to fit yourself awkwardly into, with the delusional fancy of becoming an exact replica of him in the process.
It's sad to see that we live by imitation and not reason, as Seneca said. Should I, in agreeing with this, thus kill myself because Seneca did so at the orders of Nero? Because a man has faults and who hasn't should I denounce all value that might be derived from their teachings?
Why, I too could pretend to be a happy flower of virtue, spiting out generic advice for the sole sake of monetary gain, hiding my bitterness and toxic resentment behind an enforced facade how would you ever know? Of course, you don't know, but merely pretend to do.
Yes, yes, good goym! Develop yourself spiritually, focus on this transcendental otherworld of yours let the Brahmins, Lamas, Rabbis, Popes, Priests and Pharaohs enjoy their lucrative surroundings and aristocratic status as they have for centuries.
Don't mind the picturesque description of the first Jesuits who visited Tibet, recalling how the commoners toiled in hard labour beneath the wealthy mountain temple. This world is cruel, isn't it? Be thou a yogi, Arjuna! No reason for you to meddle in politics, in public life, in culture, in the society of your fellow men starve, abstain, renounce, just do anything but gaining the same appetite for life as us.