There are a couple views I know of, in response to this philosophical question. One: the very insistence upon "us" being the determinants ('deliberately') of actions is language that expresses control over ourselves independent of the world around us. Is this control actual, or just a product of the language we've developed?
How is language the expression of control over ourselves independent of the physical realm? (I mean, one can use language to say, "I have control over myself independent of my circumstance." But what backs that up, because the statement in itself does not mean it's true.) What we express is already limited to the methods of human expression, let alone expressions are only reactions to impressions. What comes out of you is directly related to what goes in, though it may be different, it is still cause and effect. Example: Impression - I see pretty girl, she begins a conversation with me. Analysis - I am suddenly aware of my options of choice (converse back, slap her, run away.) I chose converse. Why, because for whatever reason I have decided that option, whether in the short run or long run, will be of benefit to me. (I might get laid, I want to appear as polite to a stranger to reaffirm my identity as 'polite', because all other options are impractical or may lead to even worse results than the conversation.) As a result, my thought comes to my expression. I repeat, decide what would be the "best response/most beneficial response", and choose my reply. She replies. I repeat. She replies. I repeat. She hesitates from replying, my last reply was a little out there. I reply again to bring tension off the last statement. She replies.....
This is just one small factor taking place, there are thousands of other factors that would be going on. If I just got out of a relationship a week ago, or a month ago, would change the entire situation. If I had a headache, If I even noticed her in the first place, etc. etc.
People often act this out, and don't consciously think about it. A reply is needed quick, your subconscious knows how to handle sudden replies (reactions.)
When it is conscious, you analyze it, more perspectives are provided by your subconscious (or superego.) You decide what is best on a more conscious level, but where is the will, if the decision is made on information from the subconscious level (something you have no control over.)
The other examines the "we" who is, and has "capability" to do things. Are "we" separate beings, independent of the world around us, or a part of a whole? Can we be both; and in being both, is the divide between us and the world actual?
Good times to be had examining both questions.
We have the capability to examine the world around us, and make decisions based off the information provided. We could not be independent of the world of us, nothing can. When there is an action, there is a reaction. If something happens to us, there is a reaction.
Still, there is "us" operating, "us" aware, "us" with experience, "us" being effected by surroundings --the language of separation. There is "us" weighing options, "us" making judgements, "us" declaring opinions, "us" picking out (making a choice) --the language of control. Always behind it there is "you" ('me").
If this will to behave, to act, isn't "real,' then is this "you" or "me" behind it? The issue calls into question whether the controller is real. What do you think, Dust1n?
Cats and tree and physics operate. We are aware, but have no control of what we are aware of. We accumulate experience, but have no control over the effects of experience, and we react based on the effects of experience. Everything is effected by surroundings. Language is just a form of communication, other animals communicate as well. How those options weigh to us if not of our control, we just have the ability to measure the weight. Our judgments and opinions are based on accumulated experience (which I mentioned earlier, we can not control the effect of experience.) Our choices are to serve out our own interest, what reaction has the most enjoyable/beneficial perceived effects. "I" am always behind it, but I can't control it, just observe it.
The controller is 'real', he's just really an observer. Only he can observe it, and no one else can. He's presence is built by and for his body.