In plain words
A hundred times greater than the Ānanda of Indra is the Ānanda of Prajāpati. A hundred times greater than this Ānanda of Prajāpati is the Ānanda of the Ātma. When you set human joy against the Ānanda of the Ātma, how much is this Ānanda of the gods, the joy of the world, the joy of man? We lose ourselves in the very joy we take in trifling things and trifling feelings. When we are immersed in this sacred Ānanda of the Ātma, what more can we keep in mind? We forget everything, and our life is given over to that Ānanda alone. This Ānanda of the Ātma is Brahmānanda. This Ānanda of the Ātma is the Ānanda of Advaita. This Ānanda of the Ātma is the supreme Ānanda. This Ānanda of the Ātma is the Ānanda of yoga. So no place in this world is to be found without this Ānanda. This Ānanda is present within all things. This is what Tyāgarāja sang:
In the ant, in Brahmā, in Śiva, Keśava and the rest, dwelling there in the fullness of Prema, You who bore the title, Sītārāma, protect me...
‘How am I to describe Your principle, which is there from the ant to Brahmā?’ So Tyāgarāja could recognise, through the wealth of his sādhana, that this Ānanda of God is in all beings.
How are we to recognise this Brahman principle? Here, humanness belongs to Prakṛti. The essence of Prakṛti is water. The fruit of water is the crop. The image of that crop is man. The essence of this man is speech. The meaning of speech is the Ṛk. The beauty of the Ṛk is the Sāma. The very essence of the Sāma is Om. Where did this Om principle arise from? Inquire, and it arose from the earth itself. All things on this earth are filled with the sound of this Om. All sound is the Praṇava itself. That is why, whatever name is to be said, people put Om first and only then go on to speak the name. Without this Praṇava, the earth here has no value at all. This Ṛg-Veda too lies within this Sāma-Veda itself. Sā, ma. These are the two syllables so named. Sā means the earth. Ama means fire. Sa+ama=Sāma. Fire is the essence of the Ṛg-Veda. Earth is the essence of the Sāma-Veda. In short, the Ṛg-Veda and the Sāma-Veda both lie within the Sāma-Veda.
This Om has a name, Udgītha. Ud means the life-breath. Gī means speech. Ta means food. In short, this Om is the principle that lies within the three, the Ātma, the Manas and the body.