“Regarding Yama and Niyama, these days, he believes, they have no validity except for two of them.
First, what is called Satya Niyama, or what to speak, what not to speak, to whom to speak, how to write, what not to write. These are Satya Niyama.
Another Niyama that should be followed is Āhāra Niyama. That is, how much to eat and what to eat, according to age, profession, etc. You see, the ancient people believed that a young boy could eat as much as he liked. But a Saṃnyāsi should only eat eight handfuls of rice, no more, per day.”
– TKV Desikachar from lectures on ‘The Yoga of T Krishnamacharya’, given at Zinal, Switzerland 1981.

“According to Manu’s authority on behaviour,
in Kālī Yuga Saṃnyāsa is not possible!
Sthiti Krama is a transition to the next stage
where you begin to accept the inevitable.
There is a great Saṃskāra of youth.
We then accept that there will be a setting of the Sun.
You eat less, reflect more, you think of God.
This is Saṃhāra Krama.”
– TKV Desikachar France 1983