Jelal-ud-Din Rumi points out in his Masnavi that the smallest insect receives its proper nourishment; either it is attracted to its nourishment or the nourishment is sent to it. Man, who is responsible for himself and who takes the responsibility upon himself for other living creatures, would never even think of the small insects living at the bottom of the wall of the house, under the earth, hidden under leaves, covered by grass. But they receive what is needed to keep them alive; and so birds and animals all receive their nourishment and everything they need to build their nests without the help of man.