A candle on a candlestick, cannot burn at both ends!
Matthew 5:14-15
Ye are the light of the world. A city that is set on an hill cannot be hid. (15) Neither do men light a candle, and put it under a bushel, but on a candlestick, and it giveth light unto all that are in the house.
We can only shine our light for one purpose, for good or evil!