It reminds me of a short Mishima story called "Sword," about a high-school fencing team. The captain of the team is Jiro, a young fencing genius, who without the sport has zero personality, but is on the verge of mastery, and can inspire his younger teammates to great improvements. Late in the story they all go to a temple on a mountain near the ocean for a summer training camp. Jiro instructs them:
"'We may be near the sea here, but for you the sea doesn't exist. If the sight of it bothers you, it means you still aren't putting enough into the training.'"
The students do eventually go off to swim, against the orders of the elder trainer, and Jiro takes the responsibility. Later in the story he commits suicide. But do not be discouraged. Here is how Jiro is described earlier on:
"...he had finally put aside the ordinary, boyish qualities still lurking inside him. Mental softness and impressionability - rebelling, scorning, lapsing occasionally into self-disgust - were to be discarded entirely. A sense of shame was to be retained, but bashful hesitation was to go.
Any feelings of 'I want to' must be done away with, to be replaced, as a basic principle, by 'I should.'
Yes - that was what he would do. He would focus the whole of his daily life on fencing. The sword was a sharp-pointed crystal of concentrated, unsullied power, the natural form taken by the spirit and the flesh when they were honed into a single shaft of pure light... The rest was mere trivia."
Walter Ramsey