Everything must be shaded by attention and inattention.
Whatever is focused by our attention wins emphasis and irradiates meaning over the course of events.

In practical life we discriminate between voluntary and involuntary attention.

We call it voluntary if we approach the impressions with an idea in our mind as to what we want to focus our attention on.

We carry our personal interest, our own idea into the observation of the objects.

Our attention has chosen its aim beforehand, and we ignore all that does not fulfil this specific interest.