1
Such sudden alternations from mental vacuity do sometimes occur thus quietly.
2
But this is only an open confession to mental vacuity, to intellectual poverty.
3
That mental vacuity and barrenness of soul to which I have alluded, is responsible for another misfortune.
4
The mental vacuity of that little room!
5
As I listened to their lazy, fragmentary conversation vast gulfs of mental vacuity seemed to open before me.