John Stuart Mill Utilitarianism

John Stuart Mill wrote What Utilitarianism Is to shift the focus from the quantity of happiness to the quality of happiness by introducing the lower and higher pleasures. Mill refers to lower pleasures as physical and higher pleasures as mental. Those who fall under the lower category are the type of people whose standards are low meaning that they are most likely to be satisfied. On the other hand, those who fall under the higher category are more like to have high standards making it hard to be satisfied easily. A higher pleasure can be something that had to be done with effort and meaning, while a lower pleasure could be something you need. He stated, "It is better to be a human being dissatisfied than a pig satisfied; better to be a Socrates

To prove that, the best quote that better captures his belief is as follows,
"Few human creatures would consent to be changed into any of the lower animals for a promise of the fullest allowance of a beasts pleasure's; no intelligent human being would consent to be a fool, no instructed person would be ignoramus, no person of feeling and conscience would be selfish and base, even though they should be persuaded that the fool, the dunce, or the rascal is better satisfied with his lot than they are with theirs."(Mill, 2001:9).
This quote, states that an intellectual wouldn't give up seeking the truth and knowledge to become the type of people that would prefer to be unaware of their surroundings in order to continue leaving in their bubble, where everything is perfect.
What Utilitarianism Is (Mill, John Stuart. "What Utilitarianism Is" Utilitarianism. Georder Shed (ed). 2nd edition. Indianapolis: Hackett, 2001).
P1. If a being of higher faculties requires more to make him happy, then is capable probably of more acute suffering, and certainly accessible to it at more points, than one of an inferior type; but in spite of these liabilities, he can never really wish to sink into what he feels to be lower grade of

Furthermore, premise one states that even though one may take longer to be pleased, the journey itself makes it worth it. Without suffering how can one achieve happiness. Therefore, one cannot sink below their level and watch from the sidelines to achieve happiness.
The "if" part, which is premise two, states that a being of higher faculties requires more to make him happy. An example would be, people who seek knowledge cannot turn their back on the truth, meaning that their expectations are very high, making it hard for them to feel satisfied. Higher pleasure sets a standard that needs to be met in order to feel pleasure.
The "then" part, which is the conclusion, states that it is capable probably of more acute suffering, and certainly accessible to it at more points, than one of an inferior type; but in spite of these liabilities, he can never really wish to sink into what he feels to be lower grade of existence. Mill means that to feel higher pleasure one must go through suffering to truly feel the satisfaction of hard work to pay off. Once you reach to that point one cannot go back and/or sink into what feels to be beneath