Feelings cannot be habitually hidden without being more or less blunted.
But, as he wrote to Young in 1824, in him "that sensibility, or that vanity, which people call love of glory" had been blunted.
Even kestrels are hovering low, their sharp eyesight blunted by the vapors below them.
They also showed in lab experiments that EPO blunted the toxic effects of the drug haloperidol on brain cells.