It's not so much that he can't fall in love, but he has not the weakness necessary.

“Moreover, during his wife's confinement, something had happened that seemed ext…”

“And so the liberal tendency became a habit with Stepan Arkadyich, and he liked …”

“I shall go on in the same way, losing my temper with Ivan the coachman, falling…”

“Die Haupteigenschaften, die ihm diese allgemeine Achtung im Amt eingebracht hat…”