Respuesta :

Tennyson used Ulysses as the old adventurer, unwilling to accept the settling of old age, longing for one more quest. Tennyson also wrote this in memory of his friend Arthur Hallam. The central theme of “Ulysses” is that there is a search for adventure, experience and meaning which makes life worth living.

Hoped this helped!
There is a few of them. One could be Mortality, another could be Perseverance, or even Dissatisfaction.