He who thinks he knows That completely does not know the Brahman at all! That’s the problem.
Somebody says: “Yes, I have understood the Brahman completely.”
Run, run, run for your life, for it is so immeasurable and infinite that no one can say he knows it, by possessing just a puny brain that is only one gene different from the Chimpanzee! We have 23 pairs of chromosomes. In fact, the Chimpanzee has 24 pairs. Think of this, even the Chimpanzee with 24 chromosomes won’t say that. We are so arrogant!
So Pippalada, the great Rishi says: “Thus far only do I know of that Supreme Brahman.”
Natah Param Astiti
There is nothing higher than the Supreme Being. I know only this much about it.
And, what did the students do? They praised him and said: “Thou indeed are our real father, who takes us across to the other shore of ignorance. Salutations to the Supreme Rishis!”
Now, here a distinction is being made of the expression, Pitaha! Nah Pitaha–our father! The teacher who helps us to know the truth is the spiritual father, as distinct from the physical father, who is Sharira Matram Janayathi–one who gives birth.
And, what is the meaning of Archana? To praise the Supreme! Any action performed in praise of the Supreme is Archana, it does not correspond necessarily in meaning of doing a ritual. Of course, rituals are also Archana.