cal. 600 (energy)
"600 is the maximum energy in the manifest universe" cal. true at 1000. Therefore, Kali is the symbol of maximum energy.
Energy without pattern is formless, but in a pattern we see its effect. Energy can be directed into a destructive or a creative pattern, as personified by Kali.
Perhaps more important than energy or pattern is intention, as that has karmic consequences. Our use of energy accrues positive or negative karma depending on whether we align with and serve the highest good.