It may not be necessary for all yoga practitioners to have a mantra practice. However, I do feel if you are earnest in your practice, you tend to develop one anyway as a consequence. Most Iyengar practitioners have had some exposure to the invocation of Patanjali, which is normally chanted before class. After Iyengar’s passing in 2014, some may have even heard the Guru Mantra which has been added to the end of the Patanjali Invocation.
Iyengar said a curious thing in one of his many writings to the effect that doing asana is like doing japa, or a practice of repeated sound forms or mantra-s. As I am heavily subbing for my teachers this month who are in China doing a teacher training, I have been writing out as many as three times as many sequences to prepare for classes.
Writing a sequence is much like writing an essay, or music composition. It is best to start with a theme. I have been taught to stay within a “clan” of poses or poses of a similar action. For example, standing poses or back bends or abdominal poses. There is a definite beginning, middle, and end to each good sequence. There is also a “sirsasana” and “sarvangasna” in each Iyengar sequence, even though you may do something in lieu of those poses. Typically, dwi pada viparita dandasana is substituted for sirsasana, and setu bandh is substituted for sarvangasana. I have been studying long enough to see that all rules can be broken, but it is best to stay within logical limits unless there is a deliberate effect you are trying to achieve through the sequence.
As I utter my daily mantra-s I notice too that they have a logical beginning, middle, and end. Take the Ganesh mantra of Om Gam Ganapataye Namah. Most of the times mantra-s begin with the Pranava or OM. Then there is a seed syllable like “Gam.” Then there is a name of the diety Ganapataye.” Then the ending “Namah” which means this is not my “self” or not my “ego.”
It is said if you utter a mantra enough times, you develop the siddhi of that mantra, or obtain the power that it beholds. Not an easy task. Some mantra-s are said to have be uttered thousands of times before this takes place.
However, if you do a sequence only a few times, you immediately understand its benefits and its limitations. In essence, the “siddhi” of the sequence is revealed to you much sooner than in the mantra practice.
As pictured above, I write my sequences in spiral notebooks and file them away once the book is completed. I have dozens of these filed away through my years of teaching. I like to look in the old ones to see where my practice and teaching have developed, or more importantly how they have stagnated.