We know, from ordinary life, ...

We know, from ordinary life, that we are not able to direct our attention perfectly steadily and uniformly to one and the same object... At times the attention turns towards the object most intensely, and at times the energy flags.
We know, from ordinary life, that we are not able to direct our attention perfectly steadily and uniformly to one and the same object... At times the attention turns towards the object most intensely, and at times the energy flags.
 Wilhelm Wundt

More phrases

An "I know what I like" mentality is hard to shake, but of course appreciation has space for being challenged.
 Ryan Gander
SHUCHU RYOKU - Focus all your energy to one point.
 Gozo Shioda
The warrior knows that the most important words in all languages are the small words. Yes. Love. God. They are words that are easy enough to say and which fill vast empty spaces.
The Warrior lives a life full of adventure, living on the edge of opportunity. Life on the edge keeps him in a space of heightened awareness and totally in the moment; therefore no matter what comes his way he is always prepared.
 James Arthur Ray
Seeing energy as it flows is an imperious need on the path of knowledge. Ultimately, all the effort of sorcerers is guided to that end. It is not enough for a warrior to know that the universe is energy; he has to verify it for himself.

Quotes from the same author

Many psychologists ... thought by turning their attention to their own consciousness to be able to explain what happened when we were thnking. Or they sought to attain the same end by asking another person a question, by means of which certain processes of thought would be excited, and then by questioning the person about the introspection he had made. It is obvious ... that nothing can be discovered in such experiments.
 Wilhelm Wundt
Contractile movements arise, sometimes at the instigation of external stimuli but sometimes also in the absence of any apparent external influence.
 Wilhelm Wundt
Psychology, on the other hand, seeks to give account of the interconnexion of processes which are evinced by our own consciousness, or which we infer from such manifestations of the bodily life in other creatures as indicate the presence of a consciousness similar to our own.
 Wilhelm Wundt
Now, there are a very large number of bodily movements, having their source in our nervous system, that do not possess the character of conscious actions.
 Wilhelm Wundt
In the course of normal speaking the inhibitory function of the will is continuously directed to bringing the course of ideas and the articulatory movements into harmony with each other. If the expressive movement which which follows the idea is retarded through mechanical causes, as is the case in writing ... such anticipations make their appearance with particular ease.
 Wilhelm Wundt