overkeenness

Nordau points out that the disease is steadily increasing in these days of specialization, and that the overkeenness of the poet's senses in one particular direction throws his nature out of balance, so that he lacks the poise to withstand temptation.

The Poet's Poet : essays on the character and mission of the poet as interpreted in English verse of the last one hundred and fifty years Elizabeth Atkins

The predominance and overkeenness of the critical had turned in him to disease!

Home Again George MacDonald 1864