one may not have sufficient spiritual reserve for constant bestowal?

52.  Those who enter the path of Great Service sometimes fear that they may not have sufficient spiritual reserve for constant bestowal. Truly they know that the giving hand does not become impoverished but it is difficult for them to apply this in its spiritual implication.  But the same is also said of the birds of the heavens who have ample food for the morrow.  Verily in cooperation with Hierarchy the spiritual store will not be exhausted. The heart that cherishes the Image of the Lord will not become silent.  Thus one need not fear consuming the spiritual store--it is inexhaustible.  One can pour out these treasures--only hold tightly to the silver thread.     -M:  Heart 1932