“it is manifestly a wiser course to aim at the maintenance of our health and the cultivation of our faculties, than at the amassing of wealth”
Schopenhauer contrasts cultivating personal capacities with treating accumulation as the main aim, placing development of the person above wealth as a measure of a good life.
Source details
The Wisdom of Life, T. Bailey Saunders translation; Project Gutenberg #10741. The sentence belongs to a philosophical comparison of personality, possessions and reputation, not financial advice.