Depending on how you use it, the key of wisdom can become a tool for good or a tool for evil. Therefore, the key is only a symbol. The wise sage continually observes how the keybearers use the key.
In the Symposium, Plato draws a distinction between a philosopher and a sage (sophos). The difference is explained through the concept of love, which lacks the object it seeks. Therefore the philosopher (literally lover of wisdom in Greek) does not have the wisdom he or she seeks. The sage, on the other hand, does not love or seek wisdom, because he already has wisdom. According to Plato, there are two categories of beings who do not do philosophy:
- Gods and sages, because they are wise;
- senseless people, because they think they are wise.
The position of the philosopher is between these two groups. The philosopher is not wise; but, aware that he is not wise, seeks wisdom, and loves wisdom. This distinction between the philosopher and the sage played an important part in Stoic philosophy that developed after Plato.