The other night I was sitting in front of my little altar that I have:
With my eyes closed, kinda asking for strength to continue following my path in confidence, chanting softly to the goddess , . . .om radha krishnaya namaha . . .wash rinse repeat. . . and after a while I opened my eyes and in the center of the flame of the left candle was a perfect heart shape at the very top of the wick glowing bright red.
It was pretty amazing, wouldn't show up in a photo though 8o)