Exercise over a long time can produce great results and give rise to a feeling of personal value. As a result, we will be able to study with joy, and every day will see some progress in our virtue. Our heart is filled with boundless joy because we have persevered and obtained a result. Pleasure and interest are distinct. Interest is the origin of exercise, and pleasure its consequence.
Interest arises from the action, and pleasure from the result.
The two are naturally different. Perseverance without concentration of mind can hardly produce results. If we look at flowers from a galloping horse, even though we may look daily, it is like not having seen them at all. If one person's heart follows a swan in the sky, he cannot compete with the person who has meanwhile been studying carefully. Hence one should concentrate all one's effort on exercise.