xxvii.) himself affected with greater pleasure, accompanied by the idea of himself.

Q.E.D.
PROP.LIV.The mind endeavours to conceive only such things as assert its power of activity.
Proof .-- The endeavour or power of the mind is the actual essence thereof (III.

vii.); but the essence of the mind obviously only affirms that which the mind is and can do; not that which it neither is nor can do; therefore the mind endeavours to conceive only such things as assert or affirm its power of activity.

Q.E.D.
PROP.LV.

When the mind contemplates its own weakness, it feels pain thereat.
Proof .-- The essence of the mind only affirms that which the mind is, or can do; in other words, it is the mind's nature to conceive only such things as assert its power of activity (last Prop.).