In this verse it is clearly explained that the Supreme Personality of Godhead, Kṛṣṇa, is the original father of all living entities. The living entities are combinations of the material nature and the spiritual nature. Such living entities are seen not only on this planet but on every planet, even on the highest, where Brahmā is situated. Everywhere there are living entities; within the earth there are living entities, even within water and within fire. All these appearances are due to the mother, material nature, and Kṛṣṇa's seed-giving process. The purport is that the material world is impregnated with living entities, who come out in various forms at the time of creation according to their past deeds.
(Bhagavad-Gita----14:4----purport).

We are all creatures of material nature. In the Bhagavad-gītā it is said that the Lord Himself is the seed-giving father and material nature is the mother of all living beings in all shapes. Thus mother material nature has enough foodstuff both for animals and for men, by the grace of the Father Almighty, Śrī Kṛṣṇa. The human being is the elder brother of all other living beings. He is endowed with intelligence more powerful than animals for realizing the course of nature and the indications of the Almighty Father. Human civilizations should depend on the production of material nature without artificially attempting economic development to turn the world into a chaos of artificial greed and power only for the purpose of artificial luxuries and sense gratification. This is but the life of dogs and hogs.
(Srimad Bhagavatam---1:10:4----purport).

The offspring of any living being is born after the father impregnates the mother with semen, and the living entity floating in the semen of the father takes the shape of the mother's form. Similarly, mother material nature cannot produce any living entity from her material elements unless and until she is impregnated with living entities by the Lord Himself. That is the mystery of the generation of the living entities. This impregnating process is performed by the first puruṣa incarnation, Kāraṇārṇavaśāyī Viṣṇu. Simply by His glance over material nature, the whole matter is accomplished.
(Srimad Bhagavatam---3:5:26----purport).

The relationship of every living being with the Supreme Lord is certainly one of son and father and not one of equality. Sometimes in love the son is more than the father, but the relationship of father and son is one of the superior and the subordinate. Every living entity, however great he may be, even up to demigods like Brahmā and Indra, is an eternally subordinate servitor of the supreme father. The mahat-tattva principle is the generating source of all the modes of material nature, and the living entities take birth in the material world in bodies supplied by the mother, material nature, in terms of their previous work. The body is a gift of material nature, but the soul is originally part and parcel of the Supreme Lord.
(Srimad Bhagavatam---3:5:50----purport).