What are the instructions given in this text regarding breathing and nuances in music?

The text explains the process of breathing in music, which consists of inhalation and exhalation without removing the mouthpiece from the mouth.
It is recommended to take a half-breath by slightly opening the corners of the mouth to regain strength during the execution.
It is not recommended to breathe on every silence, especially in off-beats.
To breathe completely, one must wait for a pause, the end of a phrase, or a fermata.
The half-breath is usually taken on dotted notes or after playing the first note of a measure.
It is a mistake to breathe on every silence, especially in off-beats.
When starting to play, it is not necessary to rush to take a breath, and it should be done slowly and imperceptibly.
The text recommends observing the nuances with scrupulous accuracy, as they are what produce the most beautiful effects in music.
To achieve good nuances, it is necessary to study sustained sounds, which form the sound quality and give width to the playing.
The text explains that nuances are to melody what colors are to painting.