I think the intent in Nisargadatta's quote is to stop the desire for the pleasure-senses. If you are able to minimize and then stop the desire for things, then you become content as you are right now, and you will find the deep happiness that you were searching for. I remember Yogananda talking about this, and he said that once you can stop the need for the sense-pleasures, you may initially feel a feeling of emptiness, but do not worry, this is not the end, but the means to an end. Because once you have that emptiness and are not seeking the quick gratification of the senses, you start seeking and realizing the deeper pleasures, the ones that are internal and then travel through the nervous system to show on the outside, as opposed to the sense-pleasures, which start from external sources and travel the nervous system to register with you internally.
A few other pieces of advice from Yogananda: "People who are slaves to the senses, find that their evil habits compel them to do things that will hurt them," "To yield to bad habits is to make them stronger and your will power weaker." I think he is saying that your inner world is where you will find the "Kingdom of God", so if you are paying attention to the pleasures on the surface of the body - taste, feel, etc, then you are taking away attention that could be focused on finding spiritual enlightenment.
A few other pieces of advice from Yogananda: "People who are slaves to the senses, find that their evil habits compel them to do things that will hurt them," "To yield to bad habits is to make them stronger and your will power weaker." I think he is saying that your inner world is where you will find the "Kingdom of God", so if you are paying attention to the pleasures on the surface of the body - taste, feel, etc, then you are taking away attention that could be focused on finding spiritual enlightenment.