Ethics
Spinoza derives an account of nature, mind, emotion, and freedom in which understanding transforms passive dependence into more active life.
There is one infinite substance, God or Nature. Particular things are modes of that reality, not independent exceptions to its causal order.
Calling yourself weak explains little about why a feeling keeps returning. Spinoza redirects attention toward causes: what is shaping your response, and what changes when you understand it better?
Mind and body are understood through different attributes rather than as two separate substances that need an external bridge. Human beings are part of nature and cannot be explained apart from it.
Each thing strives to persist, and emotions express changes in its power of acting. Inadequate ideas leave people comparatively passive, shaped by causes they do not adequately understand.
Reason and more adequate understanding support active responses, cooperation, and a different relation to desire. Freedom is not uncaused choice; it is increased understanding of necessity, culminating in Spinoza's account of intellectual love of God or Nature.
Conatus links self-preservation with changes in a thing's power of acting.
Understanding is not the same as excusing everything. It can make responsibility more practical, because changing a condition often accomplishes more than repeatedly condemning the person caught inside it.
Desire is understood through causes rather than an exception to nature.
Joy and sadness express increases and decreases in active capacity.
Affect can be reinterpreted through a clearer understanding of its causes.
Rational cooperation follows from recognising interests shared with other people.
Spinoza's geometrical presentation aims to make the system's dependencies explicit.
Mind and body are understood through different attributes rather than as two separate substances that need an external bridge.
What changes when a recurring feeling is approached through its causes rather than through another accusation of personal weakness?