Evil Perspective:
Hello, My name is Grol Darkeye. My god is named Bane, and he's the embodiment of dark order in this chaotic world. He is by no means good, in fact, he can be brutal at times. However, through the power of my prayers to Him, I can swing my weapon faster and harder. I can cure or even heal my wounds or even hit certain enemies harder.
Paladins, you see, don't always have to follow the "good" gods of this world. Evil needs servants as well.
Good perspective:
Hello, my name is Aneirin Grace. My god, through his grace and goodness, has offered me the power to increase my life force through combatting others. Through this power, I can single handedly defeat even the most evil of opponents.
It can all be explained away. But the only logic I feel I should be bound to is my own.
And in a fantasy world, I have none.