The power of faith. The power of the promises of God. To the world, this power is weak, meaningless, powerless, but to us who are saved, it is the mighty power of God and the means or our ultimate victory. As those of us who live Canada know, when temperatures plunge well below zero, few cars left outside will start. The oil thickens and holds engine parts like heavy syrup.
Cold batteries are incapable of giving enough power.
Only batteries that are kept warm or those that are frequently charged will do the job. Unused batteries freeze. If you attempt to charge a frozen battery, it can explode. Unused spiritual batteries also die in the cold of unbelief. Only by regular use and by receiving power from an outside source can spiritual power be maintained.