Fascination. Continuesly growing, adapting, evolving, the light has managed to thrive for eternity, no matter what was in their path. Those who spread infection of darkness over ours voids received gifts the great creators have left behind. They are trying to capture the light with knowledge that wasn't meant for their impure community.
Anger. The darklings' minds are the result of evolutionary failure. Impure, fickle, weak.
Although they consist of weaknesses, they proved to be rock in the way of the ever growing light. Our kind shall take advantage of their imperfection to bring their "house of cards", a phrase used by the darklings to describe a structure that seems strong to witnessers but is fragile in its composition, to a fall once and for all.
The lights of the Abyss will end their misery and thus free the voids from darkness. Joy.