Shiva is the god of the yogis, self-controlled and celibate, responsible for change both in the form of death and destruction and in the positive sense of destroying the ego, the false identification with the form. This also includes the shedding of old habits and attachments. Lord Shiva is the destroyer of the world and restorer, following Brahma the creator and Vishnu the preserver, after which Brahma again creates the world and so on.
The psyche is the greatest of all cosmic wonders and the “sine qua non” of the world as an object. It is in the highest degree odd that Western man, with but very few – and ever fewer – exceptions, apparently pays so little regard to this fact. Swamped by the knowledge of external objects, the subject of all knowledge has been temporarily eclipsed to the p oint of seeming nonexistence.” (Carl Gustav Jung, psychologist.)
A Shiva Linga consists of three parts, the lowest of which is called the 'Brahma-Pitha,' the middle one, the 'Vishnu-Pitha' and the uppermost one, the 'Shiva-Pitha.There is a mysterious or indescribable power or 'Shakti' in the Linga, to induce concentration of the mind, and helps focus one's attention. That is why the ancient sages and seers of India prescribed Linga to be installed in the temples of Lord Shiva. In Sanskrit, Linga means a 'mark' or a symbol, which points to an inference. Thus the Shiva Linga is a symbol of Lord Shiva - a mark that reminds of the Omnipotent Lord, which is formless. A Shiva Linga consists of three parts, the lowest of which is called the 'Brahma-Pitha,' the middle one, the 'Vishnu-Pitha' and the uppermost one, the 'Shiva-Pitha.There
As we all know that Lord Shiva has many names and there is a story behind every name. He is also known as kalantak, The One who ends time. It also means that there is nobody in this world beyond Lord Shiva. He is the one who can save anyone from death and make him Immortal. He is the Mahayogi free from all desires and attachments. He is the one who always loves his devotees and shower them with his blessings. That is why he is also known as Bholenath. If he is happy from your prayers then he will fulfill your desires no matter what it is.
Shiva is said to be at the core of the centrifugal force of the universe, due to his responsibility for death and destruction. Unlike the godhead Brahma the Creator, or Shri Vishnu the Preserver, Shiva is the dissolving force in life. But Shiva dissolves in order to create, since death is necessary for rebirth into a new life. So the opposites of life and death, creation and destruction both reside in his character. Shiva is in the world and in the same time he is beyond the world. In the beginning nothing existed, neither the heaven nor the earth nor any space in between. So non-being, having decided to be, became spirit and said: “Let me become!”. He warmed himself, and from this was born fire. He warmed himself further still and from this was born light.
Lord Shiva and Nandi are inseparable. Nandi, also called Nandikeshvara and Nandishvara, is the name of the gate keeper of Kailasa, the abode of Lord Shiva. He is usually depicted as a bull which also serves as the mount to Shiva. He is one of the Gana of Shiva. Nandi is the bearer of truth and righteousness. The word Nandi has come from Tamil root word Nandhu means to grow, to flourish or to appear which was used to indicate growing fluorished white bulls as well as divine bull nandi. The Sanskrit word nandi has the meaning of "happy", "joy" and "satisfaction"; also said as the properties of divine guardian of Lord Shiva - Nandi. Almost all Shiva temples display stone images of a seated Nandi, generally facing the main shrine. Nandi is described as the son of the sage Shilada. Shilada underwent severe penance to have a boon ; a child with immortality and got Nandi as his son. It is said that Nandi was born from a Yajna performed by the Shilada and his body was clad in armour made out of diamonds when he was born. Nandi grew as an ardent devotee of Lord Shiva and he did penance to become the gate-keeper of the Lord Shiva as well as his mount.