If you want to achieve your objectives, you have to be prepared for a daily dose of pain or discomfort. At first, it's unpleasant and demotivating, but in time you come to realise that it's part of the process of feeling good, and the moment arrives when, if you don't feel pain, you have a sense that the exercises aren't having the desired effect.
The man whose whole life is spent in performing a few simple operations, of which the effects are perhaps always the same, or very nearly the same, has no occasion to exert his understanding or to exercise his invention in finding out expedients for removing difficulties which never occur. He naturally loses, therefore, the habit of such exertion, and generally becomes as stupid and ignorant as it is possible for a human creature to become.
In lazy apathy let stoics boast, their virtue fix'd: 't is fix'd as in a frost; contracted all, retiring to the breast; but strength of mind is exercise, not rest.
Genius is a sovereign power; it forms schools; it lays hold on the spirits of men, with irresistible might; and it exercises an immeasurable influence on the whole condition of human life. This sovereignty of genius is a gift of God, possessed only by his grace. It is subject to no one and is responsible to him alone who has granted it this ascendancy.
Whatever folly men commit, be their shortcomings or their vices what they may, let us exercise forbearance; remember that when these faults appear in others it is our follies and vices that we behold.