And because our reason ...

And because our reason violently deters us from the brink, therefore, do we the more impetuously approach it. There is no passion in nature so demoniacally impatient, as that of him, who shuddering upon the edge of a precipice, thus meditates a plunge. To indulge for a moment, in any attempt at thought, is to be inevitably lost; for reflection but urges us to forbear, and therefore it is, I say, that we cannot. If there be no friendly arm to check us, or if we fail in a sudden effort to prostrate ourselves backward from the abyss, we plunge, and are destroyed.
And because our reason violently deters us from the brink, therefore, do we the more impetuously approach it. There is no passion in nature so demoniacally impatient, as that of him, who shuddering upon the edge of a precipice, thus meditates a plunge. To indulge for a moment, in any attempt at thought, is to be inevitably lost; for reflection but urges us to forbear, and therefore it is, I say, that we cannot. If there be no friendly arm to check us, or if we fail in a sudden effort to prostrate ourselves backward from the abyss, we plunge, and are destroyed.

Quotes from the same author

Those who dream by day are cognizant of many things which escape those who dream only by night.
In the Heaven's above, the angels, whispering to one another, can find, among their burning terms of love, none so devotional as that of 'Mother.
I must perish in this deplorable folly. Thus, thus, and not otherwise, shall I be lost. I dread the events of the future, not in themselves, but in their results. I shudder at the thought of any, even the most trivial, incident, which may operate upon this intolerable agitation of soul. I have, indeed, no abhorrence of danger, except in its absolute effect-in terror. In this unnerved-in this pitiable condition-I feel that the period will sooner or later arrive when I must abandon life and reason together, in some struggle with the grim phantasm, FEAR.
In the marginalia ... we talk only to ourselves; we therefore talk freshly - boldly - originally - with abandonment - without conceit.
It is the curse of a certain order of mind, that it can never rest satisfied with the consciousness of its ability to do a thing.Still less is it content with doing it. It must both know and show how it was done.