As the attendant to the light, the Shamash is responsible for lighting all the others. So too, each of us is a light. We have the choice as to whether we live from that lit-up place or ignore our light.
The world is rife with worthy causes we have taken up with enthusiasm and then abandoned. Rededicate yourself to repairing God's anguished world. If we manage that, the oil will burn for countless nights to come.