Nature of Brahman

Chandogya Upanishad 3:14.1 teaches: ‘All this indeed is Brahman’, explaining that everything originates in Brahman, lives in it and becomes absorbed into it. Brahman is therefore the source, sustainer and ultimate destination of existence, not merely one powerful being among other beings. The passage also encourages calm meditation on Brahman: understanding this underlying reality is a spiritual task, not just an explanation of how the universe exists.

Everywhere, yet present within the heart

Brahman is understood as omnipresent, meaning present everywhere. Divine reality is therefore not confined to a temple, a sacred place or a particular part of the universe. Brahman is also immanent: present within the world and living beings.

Katha Upanishad 5:2, also numbered 2.2.2, describes the divine as dwelling in heaven as the sun, in the atmosphere as the wind, on earth as fire and in the house as a guest. It also describes divine presence among people, in water and in the rivers flowing from mountains. These varied examples connect the divine with the natural world and human life alike: wherever a person looks, existence depends on the same unchanging Brahman.

The following verse, Katha Upanishad 5:3, describes the divine as dwelling within the heart and sustaining the powers of life. The heart here expresses a person's innermost spiritual life; it does not mean that Brahman is a physical substance stored inside the bodily heart. Together, these teachings convey divine presence both throughout the universe and within the individual.

This helps explain why spiritual reflection can involve looking inward, rather than only seeking something outside oneself. The atman is the spiritual self. In a monist interpretation, discovering the true nature of the atman means recognising its oneness with Brahman. Not all Hindus understand the relationship between the individual self and God in this way.

Brahman can also be described as transcendent, beyond the universe and its limitations. Immanence and transcendence need not contradict each other: the divine can be present throughout creation without being limited to creation.

Bhagavan: a personal and loving God

Hindu understandings of the divine are not restricted to an impersonal spiritual reality. Bhagavan refers to the supreme personal God, with whom devotees can have a loving relationship. ‘Personal’ does not mean an ordinary human being. It means that God can be approached as someone who can be known and loved, rather than only as an abstract reality.

This understanding supports bhakti, loving devotion. Prayer, worship and surrender to a deity allow devotees to express trust and love. Krishna is an important example of the personal divine.

In Bhagavad Gita 14.27, Krishna declares: ‘I am the basis of the formless Brahman, the immortal and imperishable, of eternal dharma, and of unending divine bliss.’ For devotees who understand Krishna as the supreme God, this supports the belief that the personal divine is the foundation of Brahman, not merely a lesser representation of it. The reference to unending divine bliss also connects the divine with lasting spiritual fulfilment.

The verse is therefore significant for belief in a personal God, although it is not simply a statement that ‘God is loving’. Its connection with loving devotion depends on how devotees understand Krishna and their relationship with him.

Nirguna and saguna: two ways of understanding the divine

Nirguna means ‘without qualities’. Nirguna Brahman is beyond form and the descriptions people normally use. The point is not that Brahman lacks value or power, but that ordinary descriptions cannot fully capture infinite reality. For example, describing Brahman as having a particular shape would impose a physical limit on what is limitless.

Saguna means ‘with qualities’. The divine can be approached through attributes, identity and personal forms, such as Krishna or Vishnu. This makes devotion possible: a worshipper can focus on divine qualities and express a personal relationship with God.

In Bhagavad Gita 11.8, Krishna tells Arjuna that he cannot see Krishna's divine form with his ordinary eyes and grants him divine sight. This connects a personal encounter with God to the belief that divine reality exceeds ordinary human perception. A personal form does not make the divine merely an ordinary physical being.

Some Hindus understand nirguna and saguna as different approaches to the same divine reality. Others give priority to one understanding, such as the supreme personal God. They should not automatically be treated as two separate gods.

Monist and monotheist interpretations

Monism is the view that reality is ultimately one. A Hindu monist interpretation emphasises Brahman as the underlying reality of everything. Apparently separate beings are understood in relation to that fundamental unity, and the deepest spiritual insight is recognition of oneness with Brahman.

Monotheism is belief in one supreme God. A Hindu monotheist interpretation emphasises the supreme personal divine, for example Krishna or Vishnu. The central relationship is between the devotee and God. The presence of many named deities in Hindu traditions does not automatically mean that every Hindu believes in many equally supreme gods.

There are reasons for each emphasis. Nirguna understanding protects the idea that infinite reality cannot be confined by human descriptions. Saguna understanding makes the divine accessible through a loving relationship and gives devotion a clear focus. A monist can argue that unity best expresses Brahman as the reality underlying everything; a monotheist can point to Krishna's declaration in Bhagavad Gita 14.27 as support for the supremacy of the personal God.

A justified conclusion might argue that nirguna and saguna are complementary ways of approaching a reality beyond full human understanding. Alternatively, it might favour one interpretation while explaining why its scriptural and philosophical reasons are stronger. Either conclusion must recognise that Hindu traditions genuinely differ, rather than assuming they all teach exactly the same thing.

• Brahman: spirit, ultimate reality and absolute truth; eternal foundation of existence.
• Chandogya Upanishad 3:14.1: ‘All this indeed is Brahman’ — everything originates in, lives in and returns to Brahman.
• Omnipresent: everywhere. Immanent: within the world. Transcendent: beyond physical limitations.
• Katha Upanishad 5:2 (2.2.2): divine presence in sun, wind, fire, people and water; 5:3 describes presence within the heart.

Personal and formless understandings

• Bhagavan: supreme personal God; loving devotion is bhakti.
• Bhagavad Gita 14.27: Krishna calls himself the basis of formless Brahman, supporting a supreme personal-God interpretation.
• Nirguna: without qualities; beyond limiting descriptions and forms.
• Saguna: with qualities; approached through divine attributes and personal forms.
• Bhagavad Gita 11.8: Arjuna needs divine sight to see Krishna's divine form; ordinary perception is insufficient.

Diversity and evaluation

• Monist: reality is ultimately one; emphasises oneness with Brahman.
• Monotheist: one supreme God; emphasises the devotee's relationship with God.
• Nirguna protects divine limitlessness; saguna makes loving devotion accessible.
• Some Hindus see these approaches as complementary; others prioritise one.