In the Brahma-sutra it is said: tad-ananyatvam arabhambhana-sabdadibhyah (2.1.14). This cosmic manifestation is a mixture of matter and spirit, but the cause is the Supreme Brahman, the Supreme Personality of Godhead. Therefore in Srimad-Bhagavatam (1.5.20) it is said: idam hi visvam bhagavan ivetarah. The entire cosmic manifestation is but a transformation of the energy of the Supreme Personality of Godhead, but because of illusion, no one can appreciate that God is nondifferent from the material world. Actually He is not different, but this material world is simply a transformation of His different energies; parasya saktir vividhaiva sruyate. There are also other versions of this in the Vedas: sarvam khalv idam brahma. Matter and spirit are all nondifferent from the Supreme Brahman, Bhagavan. Lord Sri Krsna confirms this statement in the Bhagavad-gita (7.4): me bhinna prakrtir astadha. The material energy is Krsnas energy, but it is separated from Him. The spiritual energy is also His energy, but it is not separated from Him. When the material energy is engaged in the service of the Supreme Spirit, so-called material energy is also transformed into spiritual energy, just as an iron rod becomes fire when placed in contact with fire. When we can understand by an analytical study that the Supreme Personality of Godhead is the cause of all causes, our knowledge is perfect. Simply understanding the transformations of different energies is partial knowledge. We must come to the ultimate cause. Na te viduh svartha gatim hi visnum [SB 7.5.31]. The knowledge of those who are not interested in knowing the original cause of all emanations is never perfect knowledge. There is nothing in the phenomenal world that is not produced by the supreme energy of the Supreme Personality of Godhead. Aromas from the earth are different scents manufactured and used for different purposes, but the original cause is the earth, nothing else. A waterpot made of earth can be used to carry water for some time, but ultimately the pot is nothing but earth. Therefore there is no difference between the pot and its original ingredient, earth. It is simply a different transformation of the energy. Originally the cause or primary ingredient is the Supreme Personality of Godhead, and the varieties are only by-products. In the Chandogya Upanisad it is stated: yatha saumy ekena mrt-pindena sarvam mrnmayam vijnatam syad vacarambhanam vikaro namadheyam mrttikety eva satyam. If one studies the earth, he naturally understands the by-products of the earth. The Vedas therefore enjoin, yasmin vijnate sarvam evam vijnatam bhavati: if one simply understands the original cause, Krsna, the cause of all causes, then naturally everything else is understood, although it may be presented in different varieties. By understanding the original cause of different varieties, one can understand everything. If we understand Krsna, the original cause of everything, we do not need to separately study the subsidiary varieties. Therefore from the very beginning it is said: satyam param dhimahi. One has to concentrate ones understanding on the Supreme Truth, Krsna or Vasudeva. The word Vasudeva indicates the Supreme Personality of Godhead, who is the cause of all causes. Mat-sthani sarva-bhutani na caham tesv avasthitah. This is a summary of phenomenal and noumenal philosophy. The phenomenal world depends on the noumenal existence; similarly, everything exists by virtue of the potency of the Supreme Lord, although due to our ignorance the Supreme Lord is not perceived in everything.