Adhyatma (अध्यात्म) is the deepest Hinduism concept of philosophy, literally meaning "relating to the self" or "pertaining to the soul." It is identified as the spiritual journey of self-discovery and self-exploration of one's inner consciousness. For anyone wanting to learn more about Hinduism and apply its principles, Adhyatma is really a foundational framework on which one can build a spiritual development platform.

The Body of Adhyatma 

Adhyatma is the science of the Self, not the limited ego-self that identifies with the body, mind, and emotions. However, the true nature of one's being is the transcendent Self (Atman). According to Hindu philosophy, this journey within is the ultimate destination for one's existence on earth.

As per Bhagavad Gita (8.3):

> "What is the indestructible and transcendent living being is Brahman. The eternal nature of such a being is called Adhyatma, the Self." 

This one verse encapsulates that Adhyatma cannot be just practice; it is the very essence of one's being within which eternal, unchanging reality lies beneath our changing experiences.

General Tenets of the Adhyatmic Path 

1. Self-Inquiry (Atma-Vichara) 

The Katha Upanishad (1.3.12) presents this fundamental approach:
> "The Self cannot be known through much study, nor through the intellect, nor through much hearing. It can be known through the Self alone that the aspirant prays to; the Self reveals its true nature to such a one." 
 

This self-enquiry asks the following questions: "Who am I?" "What is true about me?" "What is the source of consciousness?" These are not just philosophical exercises but the direct way to penetrate the many layers of identification that we carry. 

2. Discrimination (Viveka)

The Vivekachudamani, a text attributed to Adi Shankara stands by the differentiation made between the real and unreal. 

> "The discrimination between Self and not-Self, the firm conviction that Brahman alone is the Truth and the world is unreal-this is known as discrimination (viveka), which is the first requisite for a seeker." (Verse 20)

Through viveka one learns to differentiate between that which is permanent (Atman) and that which is impermanent (body, mind, objects).

3. Detachment (Vairagya)

The Bhagavad Gita (2.47) teaches further:

> "You have a right to perform your prescribed duties, but you are not entitled to the fruits of your actions. Never consider yourself to be the cause of the results of your activities, nor be attached to inaction." 

Non-attachment refers to acting without being tied down to outcomes rather than withdrawing from life.

4. Meditation (Dhyana)

Svetasvatara Upanishad (2.8-9) explains:

> "Keeping the body steady, with the three parts (chest, neck, and head) erect, directing the senses and the mind toward the heart, the wise person should cross all the fearful currents by means of the boat of Brahman." 

Daily meditation gradually brings the person into immediate contact with the experience of the higher self beyond thought.

Living Practically Adhyatma 

For practical incorporation of Adhyatma for day-to-day living within Hindu spiritual processes: 

- Begin with simple meditations: Begin with just ten to fifteen minutes a day of simply sitting, quietly focusing on breathing, and just watching thoughts pass rather than getting attached to them. 
- Study sacred texts: The Upanishads, Bhagavad Gita, and Yoga Sutras are practically applicable. Begin with getting a good translation of the Bhagavad Gita, especially the portions in Chapters 2, 6, and 13. 
- Self-observation: throughout the day periodically pose the question of "Who is experiencing this?" in order to create the witness consciousness. 
- Find a Guru: As the Mundaka Upanishad (1.2.12) states, "For now, such knowledge occurs in reality only when one submits to a valid Guru well-versed in sacred texts and who has attained to Brahman."

Modern Resources 

To study more deeply, refer to the following reputable translations and commentaries: 

- The Upanishads translated by Eknath Easwaran 
- God Talks with Arjuna: The Bhagavad Gita by Paramahansa Yogananda
- Self-Knowledge (Atmabodha) by Adi Shankaracharya
- The Yoga Sutras of Patanjali with commentary by B.K.S. Iyengar. 

With the practice of loving-indulgent attention to the interior world, the journey of Adhyatma is known to be very personal as it is universally collective. Through this former practice, one finally comes to experience the timeless wisdom of Chandogya Upanishad. "Tat Tvam Asi" means "That You Are," which refers to the realization of one's true unity with Divine consciousness, which bars no one in all of existence.