I saw an interesting science trick. You take a few small candles, place them in a row and then light them. You then take a small glass and put in a little baking soda and vinegar. Not enough to produce a volcano, but just so it bubbles; I don’t know the exact amounts.
Being careful not to tip the glass too far and pour out the liquid, you slightly tip the glass over the candles and the flames will be extinguished. The vinegar and the baking soda produce carbon dioxide, which is heavier than air and remains in the glass just above the liquid. When you tip the glass over you pour the carbon dioxide out and invisibly extinguish the flames.
The flames are extinguished but the source isn’t readily discernible.
Paul states in I Corinthians 15:33 that we should not be confused, bad company corrupts good morals. Our flame can be put out by unseen forces if we are not aware of the influences around us.