Bernard leaves us on a semi-hopeful note, suggesting that, after all the characters' teeth-gnashing about death, aging, and alienation from others, he's going to fight against the forces of decline, death, and disengagement; indeed, he declares, "Against you I will fling myself, unvanquished and unyielding, O Death!" (9b.84).
It seems like Bernard is not just going to resist these aspects of existence, but actively fight them. It's almost a violent image. We wish him the best of luck… even though we're not totally sure about the anti-aging properties of language. We are, however, sure that language does has the power to convey the most complex aspects of human communication and identity.
Up top, Virginia Woolf.