Acceptance is the mantra for Happiness.
Can you see Light without a Dark background? No.
So accept the Dark with the Light.
What good is Goodness if there is no capacity or concept of Evil?
It is only by following Goodness while rejecting available Evil that we can show our Power.
So accept the Evil.
Do not hate anything.
Everything has a Purpose.
Go for Light, do not hate the Dark. Choose and spread Good over Evil, but do not get demoralised by Evil. Seek Truth but do not let Falsehood upset you.
Accept all you perceive. Be Happy.