Bhagavad Gita: Chapter 15, Verse 15

सर्वस्य चाहं हृदि सन्निविष्टो
मत्त: स्मृतिर्ज्ञानमपोहनं च |
वेदैश्च सर्वैरहमेव वेद्यो
वेदान्तकृद्वेदविदेव चाहम् || 15||

sarvasya chāhaṁ hṛidi sanniviṣhṭo
mattaḥ smṛitir jñānam apohanaṁ cha
vedaiśh cha sarvair aham eva vedyo
vedānta-kṛid veda-vid eva chāham

sarvasyaof all living beings; chaand; ahamI; hṛidiin the hearts; sanniviṣhṭaḥseated; mattaḥfrom Me; smṛitiḥmemory; jñānamknowledge; apohanamforgetfulness; chaas well as; vedaiḥby the Vedas; chaand; sarvaiḥall; ahamI; evaalone; vedyaḥto be known; vedānta-kṛitthe author of the Vedānt; veda-vitthe knower of the meaning of the Vedas; evaalone; chaand; ahamI


BG 15.15: I am seated in the hearts of all living beings, and from Me come memory, knowledge, as well as forgetfulness. I alone am to be known by all the Vedas, am the author of the Vedānt, and the knower of the meaning of the Vedas.


God has created within us an amazing mechanism equipped with the faculties of knowledge and memory.  The brain is its hardware and the mind and intellect are like its software.  We often take this mechanism for granted.  Surgeons perform a brain transplant and become proud of their feat, but they do not stop to ponder how this amazing mechanism of the brain got created.  There are still many areas where, despite all the progress in technology, computers cannot compare with the functioning of the human brain.  For example, software engineers are still struggling with face-recognition technology, while humans can easily recognize people even after their looks change.  Hence, we hear remarks such as, “O dear friend, it is nice meeting you after such a long time.  You have changed so much since we last met.”  This demonstrates that the human brain can identify faces even though they change over years, while computers cannot even perfectly recognize unchanged faces.  At present, engineers are still struggling with scanner software that reads typed material flawlessly.  In contrast, humans can perfectly understand even sketchy handwritings of others.  Shree Krishna states that the amazing faculties of memory and knowledge come from Him.   

Further, He also attributes the power of forgetting to Him.  As unwanted records are destroyed, the living being does away with purposeless retention of memory, without which it would have been clogged with information.  Uddhav tells Shree Krishna: 

tvatto jñānaṁ hi jīvānāṁ pramoṣhas te ’tra śhaktitaḥ   (Bhagavatam 11.22.28)

“From You alone the knowledge of the living being arises, and by Your potency that knowledge is stolen away.” 

Apart from this internal faculty of knowledge that we possess, the external source of knowledge is the scriptures, and Shree Krishna reveals His glories in that context as well.  It is He who manifested the Vedas at the beginning of creation.  However, as God is divine and beyond the purview of the intellect, these Vedas are also divine.  Hence, He alone knows their true meaning, and if He bestows His grace upon someone, that fortunate soul also becomes a knower of the Vedas.  Ved Vyas, who was an avatar of God, wrote the Vedānt Darśhan.  Thus, Shree Krishna states that He is the author of the Vedānt as well. 

Finally, He says that although the Vedas contain innumerable material and spiritual instructions, the object of all Vedic knowledge is to know Him.  The fruitive ritualistic ceremonies are also there for a purpose.  They lure people who are deeply attached to the material world, and provide them with an intermediate step, before directing them toward God.  The Kaṭhopaniṣhad (1.2.15) states:  sarve vedā yat padamāmananti  “All the Vedic mantras are actually pointing toward God.”  We may memorize all the Vedic mantras, learn to recite them in proper meter, master all the rites and rituals, engage in meditation, and even awaken the kuṇḍalinī power, but if we do not know God, then we do not really understand the true objective of the Vedas.  On the other hand, those who develop love for God automatically comprehend the purpose of all the Vedic scriptures.  Jagadguru Shree Kripaluji Maharaj states:

sarva śhāstra sāra yaha govind rādhe, āṭhoṅ yām mana hari guru meṅ lagā de

(Rādhā Govind Geet)

“The essence of all the scriptures is to engage your mind day and night in loving devotion to God and Guru.”

In this chapter, from verse 1 to 15, Shree Krishna explained the tree of creation.  Now while concluding the topic, He describes the terms kṣhar, akṣhar, and Puruṣhottam in the next two verses, to put that knowledge in proper perspective.