There are many things that meditation is good for. Calming the mind, dis-empowering the internal dialogue, and allowing oneself to see matters clearly without the baggage of emotions. One of the most beneficial effects of meditation is the ability to let go. It wouldn’t be a lie to say that the practice of meditation is the practice of letting go.
So as we all know in meditation – at least the meditation I practice – all that is done is that the attention is placed onto an object and whenever it is realized that the attention has wandered it is brought back to the object.
So where is the letting go? I hear you ask. Well when your attention has wandered it always clings to something. The more distracted you are the more your mind is clinging to something. That is why it is easier to bring your attention back to the anchor if it has only wandered onto something relatively boring like trying to remember what you ate yesterday. When it has wandered to a more appetizing realm like sex, food or how miserable you are then it is harder to bring back.
Often you can tell how much your mind is clinging to something by how long it takes you to realize it has been distracted (though this can also be caused by being full or eating sugary foods I have found).
What you call “difficulty” is really nothing other than the battle that takes place within you between two wants. On the one hand you want to do the practice but on the other hand you want to continue fondling those imaginary boobies. By bringing your attention back to anchor you are letting go of that desire.
Enlightenment can be seen as the complete letting go of everything. This doesn’t mean that nothing happens or that you no longer exist. It just means that you are totally passive in the face of everything. Whatever arises is fine.
See I believe that enlightenment is incredibly easy to grasp on an intellectual level. It is the cessation of suffering. That sentence is no harder to comprehend than the sentence “Peas are green”. The difficulty comes when we try to envisage what it would “feel” like to be enlightened. This is because we always place ourselves as we are into that picture and if we are suffering then suffering is so seemingly intrinsic to us that we cannot imagine it away. A blind person could understand on an intellectual level the sentence about peas but they couldn’t know what it felt like to see green peas.
Suffering is caused by clinging which is another way of saying wanting. The fundamental thing we cling to is our wants. We always hold out for our desires no matter how miserable not having them makes us or how unlikely it is that we we will get what we want. Even when we do get what we want and are satisfied for a bit but eventually return to Dukkha (suffering) we still hold out for that one want that when satiated will satisfy.