"If some one were to strike at the root of this large tree here, it would bleed, but live. If he were to strike at its stem, it would bleed, but live. If he were to strike at its top, it would bleed, but live. Pervaded by the living Self that tree stands firm, drinking in its nourishment and rejoicing;

In plain words: The father says that if someone cuts a big tree at its root, trunk, or top, sap flows out like blood, but the tree stays alive. Because the living Self fills the tree, it stands strong, drinks in its food, and is happy.