Ascending dialectic (n.) must show not only that spirit needs finite things but that finite things need spirit; otherwise Hegel's system is just another faith.
Being and nothing (n.) teach that in the end all abstractions are alike: a spirit with no particular features is no different from bare being, and real spirituality is also material.
Being and nothing (n.) are not a thing and its absence: the nothing set against pure being is not the nothing of some particular thing but nothing in its bare, indeterminate simplicity.
Dialectical reduplication (n.) is like a woman's coyness: it holds out against everyone and yields only when the true lover — real seriousness — appears.