@ekknappenberger Maybe the SEP-entry on authenticity could capture something essential? https://plato.stanford.edu/entries/authenticity/ I didn't have that on my mind when using the attribute 'sincere'. But the criticism of authenticity as, e.g., self-indulgency, does resonate. I really don't like what Adorno condemned as the "liturgy of inwardness". Perhaps even stoicism, fashionable among affluent people, is culpable of propagating something like that?