Because Fire is the Only Tattva, which doesn't get impure. Other tattva like Water, air etc can get impure. That's why it is used in cremation too.
Related question : Why do Hindus believe in cremation instead of burial?
According to Chhandogya Upanishad,
अस्य लोकस्य का गतिरित्याकाश इति होवाच
सर्वाणि ह वा इमानि भूतान्याकाशादेव समुत्पद्यन्त
आकाशं प्रत्यस्तं यन्त्याकाशो ह्येवैभ्यो ज्यायानकाशः
परायणम् ॥ १.९.१॥
I-ix-1: (Salavatya) 'What is the essence of this world?' 'Akasa' said (Pravahana); 'All these beings arise from Akasa alone and are ...
There are such references in the Upanishads as well as in the Tantras.
From the SAriraka Upanishad (one of the 108 Upanishads and it is linked with the Krishna Yajurveda):
OM. The body is a compound of prthivi (earth) and other mahabhutas
(primordial elements, as apas or water, agni or fire, vayu or air, and
akas ). (In the body), that which is hard ...
How do we find the difference between Akasha and Prana ?
-- Akasha Mahabhuta is composed of many components and Prana is one of the major component of Akasha.
स इमान् प्राणान् आकाशान् अभिनिर्मन्थति। (Jaiminiya Brahamana 2.18)
Akasha is formed by the churning (Manthana) of Prana Rashmis.
Same thing is also called in Taittariya Samhita:
प्राणो वा अन्तरि...
Akasha is said be to one of the Pancha Mahabhuta and firstly created from Brahman.
Taittariya Upanishad 2.1:
ॐ ब्रह्मविदाप्नोति परम् । तदेषाऽभुक्ता ।
सत्यं ज्ञानमनन्तं ब्रह्म ।
यो वेद निहितं गुहायां परमे व्योमन् ।
सोऽश्नुते सर्वान् कामान्सह । ब्रह्मणा विपश्चितेति ॥
तस्माद्वा एतस्मादात्मन आकाशः सम्भूतः । आकाशाद्वायुः ।
वायोरग्निः । अग्नेरापः । ...
The five elements you referred to are together called the "Pancha Bhootas".
Now,The Pancha Karmendriyas(Indriyas=Senses,Karma=Activity/Work,Jnana=Knowledge)are related to excretion,reproduction,& the acts of grasping,moving & speaking.
Where as, the "Pancha Jnanendriyas" are related to the acts of smelling,tasting,seeing,touching & hearing.
As the material world is made up of five great elements/PanchaMahabhuta, everything is associated it with. Similarly in Jyotish the 12 constellation are also related with it. It shows which constellation/Rashi is characterized by which Tatwa.
According to classification by Brihat Parashar Horashastra from 4.6-4.24:
(1) Ar(Mesha), Le(Simha) and Sg(Dhanu) ...
Akasha is present everywhere. It is the substratum of all other bhutas. Without the existence of space, nothing else could exist because there has to be something that will act as a base. And that something is akasha or space that pervades everything. Hence, akasha is one of the five fundamental elements. In fact it is the most important fundamental element ...
I am giving excerpts from 'The Serpent Power' by Sir John Woodroffe on the Bhutas including Akasa. Sir John compares Akasa with ether but I will remove those parts from the excerpt posted here:
The Indian theory [says] that ...scientific or ponderable matter does
not permanently exist, but says that there are certain motions or
forces (five in number)...
I am posting an excerpt from Mahabharata that supports organ donation:
The Deities said,-…The Asuras are being aggrandised, while we are
being weakened. It behoveth thee, therefore, to ordain what is for our
good. –After the deities ceased, the Grandsire replied, - The great
Rishi Dadhichi of Bhrigu’s race is now engaged in performing severe
Your question is how to explain that earth is made up of PanchaMahabhutas . Earth itself is one the Panchamahabhutas . This is very interesting question. So first of all let's understand that there are two earth elements one is subtle and one (on which we live) is gross element.
As suggested by user Rickross , the answer is present in Panchikarana ...
Is vacuum not same as Ākāśa?
No , Akasha or Space is not same as vacuum .Even from modern discoveries, its clear that empty space isn’t so empty , space is filled with invisible Dark-Matter , other low mass particles ,and background radiation.
How do Hindu scriptures define Ākāśa?
In Hinduism scriptures like Purusha Sukta from Rig-Veda and various ...
There is a story in Mahabharata Santi Parva about a time when virtue and vice disappeared due to unrestrained sexual indulgence. Then the Vedas disappeared. When both the Vedas and righteousness were lost the gods were possessed by fear. Overcome with fear they sought the protection of Brahman. The gods said unto Brahman with joined hands, 'O god, the ...
Rather than having an abstract idea about these 5 elements and in particular about the Akasha element you can also have a more direct and a "related to your own physical body" kind of concept for each of them .
Such expositions of ideas are found in the Yoga Tattva Upanishad (which is associated with the Krishna YajurVeda). Here Lord Vishnu is doing all ...
Actually, bootha doesn't necessarily mean "ghost." The pancha boothas are the five temples of shiva. Each of them represent the five prime elements of nature: like you said land, water, air, sky, and fire.
Ankit Sharma's answer is absolutely correct. Five elements can cleanse a person's body of its impurities. Water washes, air removes the carbon dioxide from our body, earth decomposes our body, or almost anything (eventually in time at-last), and I don't have a clear idea how sky actually does it. But Agni being the superior because Agni can clean any ...
Five primary elements appeared at the beginning of the creation, before the universe took shape. They evolved one out of the other, beginning with ether/space.
Their purpose is to carry information about a particular kind of “pleasure” so that ether enables sound and hearing, air enables movement and touch, fire enables shape and sight, water taste, and ...
According to Samkhya Yoga , the Universe is made up of two basic elements--matter( solid,liquid and gaseous) and ether(space and an air-like substance that fills the Inter-Stellar space)*.Life comes out of interaction between Ether(spirit,dehi,atman,purusha) and Matter(body,deha,sharira,prakriti). Energy and Time (Maya ,Shakti) serve as forces that bind ...