Many people have the idea that in each of us there is a reservoir containing a certain supply of energy. This is supposed to be strictly limited in amount. If our expenditure is excessive they say, our energy is depleted and we suffer from fatigue. So we take the attitude of economizing our little store of strength, conserving our resources, lest the stingy springs run dry. In contrast with this point of view is one akin to the teaching of Jesus. That is, our energies seem to be used up, not because the flow is checked, but because either the channel is blocked or we have not learned to use our capacities in the right way. In other words, we are tired not when we do too much but when we do too little. Our hidden springs are not of body but of spirit; we are not receptacles but conductors.
E. Stanley Jones
Open your mouth for the mute, for the rights of all who are destitute. Open your mouth, judge righteously, defend the rights of the poor and needy.
The English Standard Version