Summa iru சும்மா இரு – Just Be or Be Still

Arunagirinathar blessed by Murugan was instructed as ‘சொல்லற சும்மா இரு ’ or ‘Just Be’ or ‘Be still’ or ‘Be without thoughts’. The Summa iru is used in many places in spiritual instruction by many sages and holy men across the world irrespective of what religion they belong to or perhaps they are beyond any religious differences.
Thayumanavar in his songs, also touches this summa irruthal and says it’s the most difficult thing to achieve and compares to tame a lion is more easier and even to get all 8 Yogic siddhis are easy compared to சும்மா இருத்தல் . (On this Kanchi Mahaswamigal explanation in தெய்வத்தின் குரல் is wonderful.)
In Talks with Ramana Maharishi one could see this getting reference to Biblical statement of ‘Be still’ and know ‘I am that I am’. This ‘Be still’ or ‘Just Be’ as summa iru is mentioned by YogaSwamigal as ‘Summa irrutthal’. Yoga Swami says this Summa irutthal to let the inner guide to be heard from மௌனம் (silence).
In Words of our Master as compiled by Yogaswami’s disciples, I was surprised to see when I did a ctrl F to search for Summa and found in below places Yogaswami uses summa in his instructions.
1. As a dog, let loose after being tied up for some time, is energetic and active, so one, who learns to remain summa, gets increased energy which can be put to good use.
2. Even meditation is work. Practise remaining summa for ten minutes.
3. Without remaining summa, the mind is running here and there. That is its nature. What does that matter?
4. Remaining summa is the best exercise.
5. Learn to remain summa. If you try to stop, it will only become more active. It is not necessary to stop it. You must ask it - "Where are you going?" But see that you do not leave your seat.
6. Now we don't control the mind. We remain summa with a controlled mind.
7. The atma is summa. Movement is for the body and mind.
8. The secret of 'summa iru ' is you. The secret of 'summa iru ' is I. The secret of ' summa iru ' is all.
9. If you remain summa (i.e. idle) without working, the mind will become impure. But the summa of jnanis is different.
10. Because he (another devotee) is unable to remain summa, he is walking to Kataragama.
11. You are Siva. I am Siva. All are Siva. Remaining summa is also Siva.
12. He (another devotee) is wandering about here and there without knowing the secret of how to remain summa. The message we can give to him is: "There is no 'you,' no 'I'.”
13. Bliss will come, if you remain summa. Why then do you want this illusory world?
14. If you remain summa, the sound of voices outside will not reach you. When you come down, you can see the world.
15. You sing and learn, because you are unable to remain summa.
16. It is not necessary to break your head over building temples and schools. You can experience bliss by remaining summa, like the top which finally comes to rest after spinning round and round. The top will go on spinning as long as the force is there.
17. Remain summa for the sake of all!
18. There is nothing to know. Remain summa.
19. Those who remain summa are the real benefactors of humanity.
http://www.himalayanacademy.com/resources/books/yogaswami/words/Pg1-44.html

20. Only God is summa, but work is going on the whole time.
21. Don't take anything from eyes, from ears, from mouth, from hands-just sit. Summa iru.
22. Summa. There is no command-summa iru. The atma is summa. You cannot be summa. Only God is summa. He is summa, but work is going on the whole time.
23. Meditation...You know meditation? Summa iru. Summa iru is meditation.
24. Tell the truth. Don't forget austerity. Do your work. Summa iru.
25. Be summa. Don't think of anything. Let thoughts come and go.
http://www.himalayanacademy.com/resources/books/yogaswami/words/Pg91-134.html