I could only guess its meaning from the context. What does it exactly mean?
In the 17th century, the philosopher Benedict de Spinoza engaged in his own mid-life repacking. He began by considering the efforts involved in pursuing what most people esteemed as the highest good ― riches, fame, and the pleasure of the senses. Spinoza concluded that, while these had their attractions, they could never provide him with the authentic happiness for which he was searching. He made a great discovery, which he phrased as follows: “Happiness or unhappiness is made wholly to depend on the quantity of the object which we love.” If we love transient attractions and values, our happiness will be fleeting and transitory as well. On the other hand, if we seek to fix our love to longer-lasting values, our happiness likewise tends to persevere.