Grief (I. xiv. 128):—
How long, my son, wilt thou thy soul consume with grief
an mourning?
Then fear (I. x. 95):—
And leaps my troubled heart as tho' it would burst
My bosom's bounds; my limbs beneath me shake.
In the same way just as fear, so he declares daring to be about the heart (I. xvi. 11):—
And fix'd in every breast
The fierce resolve to wage unwearied war.
From these passages the Stoics took the opinion that the leading element is about the heart. That the appetitive element is placed in the intestines in many places he declares; in these verses, for example (O. xviii. 54):—
But my belly's call is urgent on me, that evil worker,—
and (O. xvii. 286):—
But now may conceal a ravening belly, a thing accursed.