When we train in the Force, we are working towards a change in our element. The force, for all intents and purposes, is much like water. As humans, we are constantly surrounded by water...the water in the ocean, the water in the ground beneath our feet, and the moisture in the air. And yet, when we think of "being in the water", we think only of being in a swimming pool or some other form of water, the sort of which we generally picture when we think of water.
This is much the same as we view the Force. The force surrounds us and flows through us...and yet we generally notice the Force when we are making a direct effort to study and understand it. The majority of people are like plants in water...they are in the water, and of the water, but have little knowledge about how to move through the water, or use the water to best advantage. Then, many users of the Force are like an Olympic swimmer...they have mastered the ability to use the water to best advantage, but are not truly cognizant of their connection to it, and it is not their natural element anymore, because the focus is not in BEING with the Force, but simply using it...just as a swimmer must come up for air, the water is not the swimmers natural element. The most powerful of the Jedi are those that take the characteristics of both the plant and the swimmer...they are able to be immersed in the Force fully, and are content with just being in and of the Force. By this, they show that they are like the plant in water. And yet, the most powerful Jedi also take on the part of the swimmer, being able to move through the Force and use its power. By doing this, the Jedi achieves both characteristics, of the plant and the swimmer, and becomes a fish in water..native in its element, and completely at one with its surroundings. It is the like the fish that a Jedi must strive to be...because if a Jedi becomes to the Force like a fish is to water, then the Jedi has accomplished a very great feat.
So how do we attain this oneness with the Force? Meditation has a large part of it...by learning to listen to the Force when meditating, you begin to hear a bit more of yourself. By hearing yourself, you begin to understand more of your place in the grand scheme of things. The next step is to be able to feel the Force when you are not meditating...the aim is to get to the point where you feel the Force simply by existing...this is how it should be, because the Force flows through you constantly. With each breath, you should feel the ebb and flow of the Force, and be able to feel it shift around you as you move, and be able to feel it within your surroundings. It is by this that a Jedi gains true awareness of his or her surroundings, and becomes aware of their true place in the universe. Thus, by feeling the Force around us, we are like the Fish who is able to feel the presence of a predator by the ebb and flow of the water, or the presence of food on the surface of the water, by the ripples it sends out. This is the goal of a Jedi...awareness through existence, and to be able to feel the force in all actions.