Meditation on the Nature of Flame

You need two candles or oil lanterns. (I personally like the symbology of the oil lamp better, but candles are fine. The biggest difference is that if you've got candles, one is going to burn down while the other doesn't.) They should be next to each other, close enough you can easily focus on both at the same time. Light the one that will cause the other lantern to cast a larger shadow.

Ritually light one lantern. Recite as you do so "I celebrate and participate in creation seen. I bring light into the darkness."

Ritually don't light the other lantern. Make the same motions, but don't strike the match/lighter/whatnot. Recite as you do so "I celebrate and participate in creation unseen. I bring darkness into the light."

Focus on the flame and the shadow. See the flame that isn't burning on the candle that isn't lit as well as the flame that is burning.

focus on the lit flame. See how it sheds light and clarity.

focus on the unlit flame. See how darkness pools.

Find the lit flame inside yourself. Find the unlit flame. Are they balanced? Do you focus more on one rather than the other? Can you face the darkness?

When you're back in balance, blow out the candle. "I celebrate and participate in creation."