We shouldn't repeat the same for ages on end, but look into the new as well.
To send light into the darkness of men's hearts - such is the duty of the artist.
Music owes as much to Bach as religion to its founder.
It is the curse of talent that, although it labors with greater steadiness and perseverance than genius, it does not reach its goal, while genius already on the summit of the ideal, gazes laughingly about.
You should neither play bad compositions, nor, unless compelled, listen to them.
Think it a vile habit to alter works of good composers, to omit parts of them, or to insert new-fashioned ornaments. This is the greatest insult you can offer to Art.