1. The Universal Omkaara Form
He is the One who blesses all beings with peace and prosperity. If we deserve to be famous, it's Sri Sarabesa who grants us fame. If we deserve to be courageous, it's Sri Sarabesa who grants us courage.
He's the great motivator. If we get stuck in the course of our endeavors, He's the One who motivates us to move forward and helps us make progress. He is the grantor of peace and tranquility. He is the dispenser of all that's good and the vanquisher of all that's evil. He's the eternal Well Wisher of all beings.
Within Siva who is the root cause of siddhi (spiritual attainment) and buddhi (spiritual intelligence), Sri Sarabesa is the Parasakthi who is the Lord of bakthi (devotion) and balam (spiritual fortitude).
2. Sarabesvara Avatar
The great Lord Narayana manifested as Sri Narasimha to rid the universe of the evil that was Hiranyakasipu. Evil Incarnate Hiranyakasipu had oppressed the universe with his tyranny. He was a consummate egomaniac. His arrogance knew no bounds and he was certain that he could do whatever he pleased. He found much pleasure in subjecting all beings, including the Devas, to much pain and suffering.
To protect the denizens of the universe and to give the evil one his due, Lord Narayana manifested his wrathful, aggressive Narasimha man-lion form. Sri Narasimha tore the demon apart thus putting an end to his tyrannical rule. To ensure that Hiranyakasipu's brand of evil is forever banished from the universe, Sri Narasimha consumed every drop of Hiranyakasipu's blood and then wore the demon's mangled body as a garland. Thus He made sure that none of the evil one's physical remains made contact with the universe. The inimitable man-lion roared and performed a terrifying dance. His eyes shone like great balls of fire and His blood curdling roar struck fear in everyone. The universe shuddered at this aggressive form of the Lord. No one could approach Him and no one could bear His all consuming aggressive energy. So the Devas, Rishis and Siddhas approached Sri Siva and requested His protection. Sri Siva, with the full support of Sri Soolini and Prathyankira Devis and Their respective entourages, manifested His supremely aggressive Sarabesvara form. He embraced Sri Narasimha, cooled Him down and made Him accessible to all beings.
3. Different Roles in Different Yugas
The Kritha Yuga is an age of dharma (righteousness). During this yuga, Sri Sarabesvara takes on the role of anugraha moorthi, the beatific Lord who blesses one and all with His grace. When righteousness falters in this age, He assumes the role of dhanda moorthi, the One who corrects and absolves small mistakes and errors.
During the Tretha Yuga, He dons the role of dhanda moorthi.
In the Dvaapara Yuga, Sri Sarabesvara is a ugra moorthi, the destroyer of sins and evil.
In the Kali Yuga (the present age), He is the prabandha moorthi who protects the virtuous and those engaged in selfless service from evil. He is the vanquisher of the foes of virtue. He's the protector of the pious and the virtuous. He destroys the evil in the evil ones and transforms them into virtuous beings.
4. Tranquil Forms and Aggressive Forms
The Lord manifests Himself as Dakshina Moorthi, the Universal Teacher, in a form that's the very definition of peace and tranquility. He also manifests Himself as Sarabesvara, the Universal Protector, in what's a supremely wrathful, aggressive form. It's the same Lord who manifests both forms.
To bless peace loving souls like Siddhas and rishis, the Lord manifests His peaceful, tranquil forms. To put the demonic, egomaniacal evil ones in their place, He manifests His wrathful, aggressive forms.
Since the Kali Yuga (the current age) is an age of evil, it's very important that we worship the Universal Protector if we want to stay away from evil.
5. Many Manifestations
Human beings are different by way of economics, education, temperament, style of thinking, karma baggage and other factors. They also differ in the perfection of their surrender to the Divine Will or the lack of it. So each one of us may gravitate to a different divine manifestation. As the expression goes, different strokes for different folks. Different divine forms may appeal to different people, but it's the same God who receives us all in the end. In a time of moral decadence and rise of evil, the worship of Sri Sarabesvara is an ideal recourse for all of humankind.
The Siddhas worship and revere all divine forms because each divine form was manifested by God for our spiritual and material welfare. If the Siddhas do this, should we not? It's our spiritual duty to acknowledge each divine avatar with gratitude and render worship to all of these divine forms.