In plain words
These are worldly acts. These are marks of pravṛtti. They are doings of the physical. But we must enter the path of nivṛtti. Only then shall we understand its oneness. Entering the path of pravṛtti, we simply forget those marks of nivṛtti. In the morning the Śāstri, speaking of the Gāyatrī mantra, said that the Gāyatrī has five faces. What are these five faces? Of them, the Śabda-Brahman, ‘Om’, is the first face. ‘Bhūrbhuvasuvaḥ’ is the second face. ‘Tatsaviturvareṇyaṃ’ is the third face. ‘Bhargo devasya dhīmahi’ is the fourth face. ‘Dhīyo yonaḥ pracodayāt’ is the fifth face. How are we worshipping this five-faced divinity? What does Gāyatrī mean? Gāyatrī is the Mother of the metres. She is the very form of the Mother of all the Vedas. This Gāyatrī has three names. Gāyatrī, Sāvitrī, Sarasvatī. Gāyatrī means She who is the ruler of our senses. Sāvitrī is ruler of the life-breaths and their support. Sāvitrī brought her husband Satyavān back to life. Sarasvatī. She is the very form of the goddess of speech. Sarasvatī, the very form of the goddess of speech; the principle of prāṇa, the all-form of the goddess of Satya; and Gāyatrī, joined with the principle of the senses: the oneness of these three is the true form of the Trinity.
Three-leaved, of the shape of the three guṇas, three-eyed, three-weaponed, destroying the sins of three births: a single bilva leaf offered to Śiva.
We must offer the oneness of these three to God. We ought to strive for such oneness; but, forgetting the moral life amid differences, we are living with the physical life as our support. Bhūrbhuvassuvaḥ. First of all we must recognise what these three mean. People take them to be the earth, the middle world and the world of heaven. Where are these three worlds? These three worlds are within a single man himself. They are in every jīva. They are in every living being. Unable to recognise this truth, we take the earth to be separate, the middle world separate and heaven separate. This bhūloka is simply material. That is, it is only a gathering of substances.