These pleasures, sometimes wild and extravagant, sometimes quieter in tone, were designed to refresh the severely taxed brain after extreme labors; and in the mysterious ways of genius they bore fruit in later days. But unfortunately he was so bent on enjoying to the full every moment of pleasure that there was room for no other consideration, whether of prudence or duty, of self-preservation or of economy. Both in his amusements and in his creative activity Mozart knew no limits. Part of the night was always devoted to composition; early in the morning, often even while in bed, he finished his work. Then, driving or walking, he made the rounds of his lessons, which generally took a part of the afternoon also. "We take a great deal of trouble for our pupils, and it is often hard not to lose patience," he wrote to one of his patrons. "Because we are well recommended as pianists and teachers of music we load ourselves down with pupils, and are always willing to add another; if only the bills are promptly paid it does not matter whether the new student be a Hungarian mustachio from the engineer corps, whom Satan has tempted to wade through thorough-bass and counterpoint, or the haughtiest little countess who receives us in a fury, as she would Master Coquerel, the hair-dresser, if we do not arrive on the stroke of the hour." So, when weary with the occupations of his profession, school-work, and rehearsals as well as private lessons, and in need of refreshment, he gave his nerves a seeming restorative only in new excitement. His health began to suffer, and ever-recurring fits of melancholy were certainly fostered, if not actually induced, by his ill health; and the premonition of his early death, which for a long time haunted him, was finally fulfilled. The deepest melancholy and remorse were the bitter fruits of every pleasure which he tasted; yet we know that even these troubled streams emptied pure and clear in the deep spring from which all joy and all woe flowed in marvelous melodies.