Bhagavad Gita Verse 7, Chapter 17

aahaararastvapi sarvasya trividho bhavati priyaha |
yajnyastapastathaa daanam teshaam bhedamimam shrunu || 7 ||
 
Food, also, which is dear to all, is of three types, and similarly, sacrifice, penance and charity. Hear this, their distinction.
 
aahaaraha : food
tu : and
api : also
sarvasya : all
trividhaha : three types
bhavati : is
priyaha : dear
yajnyaha : sacrifice
tapaha : penance
tathaa : similarly
daanam : charity
teshaam : these
bhedam : distinction
imam : this
shrunu : hear
 
Shri Krishna now begins to explain the method by which we can analyze the texture or the nature of our faith. The principle here is to assess the attitude with which we perform actions. The type of attitude maintained while performing an action will reveal whether our faith is saatvic, raajasic or taamasic. Shri Krishna covers the entire spectrum of actions performed by us with just four categories: our intake of food, sacrifice, penance and charity. To better understand these categories, we need to understand the underlying symbolic meaning.
 
We have come across broader meaning of the term yajnya or sacrifice in karma yoga. It refers to any action or transaction with another person or object while adhering to our duty. If we are an accountant by profession, then earning a livelihood as an accountant becomes a yajyna or sacrifice. Next, tapas or penance is the means by which we conserve energy needed to perform our duties. A scientist will give up innumerable opportunities to party because he is performing an experiment in his lab in the night. This is penance. Daanam or charity refers to the donation of excess wealth accumulated while performing our duties. The act of charity helps reduce our level of lobha or greed.
 
The intake of food or aahaara is given its own category. It different than sacrifice, penance or austerity for a couple of reasons. Any action performed towards feeding the body gives its phala, its result, immediately. But any other type of action gives its result much later. Furthermore, the result of feeding our body is restricted to the body, not to anything or anyone else. That is why people who are very diligent in their duties can become lax in their dietary habits. Food is analyzed in great detail in the next three shlokas.

Bhagavad Gita Verse 17, Chapter 13

jyotishaamapi tajjyotistamsaha paramuchyate |
jnyaanam jnyeyam jnyaanagamyam hridi sarvasya vishthitam || 17 ||
 
That is the light even among all the lights, and it has been spoken of as beyond darkness. It is knowledge, that which is to be known, and the goal of knowledge. It especially resides in the hearts of all.
 
jyotishaam : among all lights
api : even
tat : that
jyotihi : light
tamsaha : darkness
param : beyond
uchyate : has been spoken
jnyaanam : knowledge
jnyeyam : that which is to be known
jnyaanagamyam : goal of knowledge
hridi : hearts
sarvasya : all
vishthitam : especially resides
 
In prior verses, the “sat” or existence aspect of the eternal essence was highlighted. Here, the “chit” or awareness aspect is elaborated upon. Awareness or sentience is what makes an entity know about it surroundings as well about itself, as we had seen earlier. Shri Krishna says that the eternal essence is the “light among all the lights”. The word “light” in the Vedas refers to awareness, to knowledge. Which means that ultimately, it is the eternal essence that provides the power of awareness, the power to know, to all beings. Without the eternal essence, we would have no awareness, no sentience.
 
Imagine a classroom of students that are taking an examination. The student on the last bench can see all of the students in front of him. The student seated in the second to last row can see other students, but not the last row student. Also, the student in the front row cannot see the student in the last row. The awareness provided by the eternal essence is like the student in the last row. The next student is the intellect, followed by the mind and the senses. In other word, the eternal essence gives awareness to the intellect, which gives it to the mind, and then to the senses. But the mind, intellect and senses cannot immediately contact the eternal essence.
 
Now, just like the word “light” refers to knowledge, the word “darkness” refers to ignorance. By saying that the eternal essence is beyond ignorance, Shri Krishna points out the uniqueness of the awareness aspect of the eternal essence. If we light a lamp in a dark room, it dispels the darkness. We cannot have darkness and light coexist. However, the eternal essence is present in individuals who are ignorance of it, as well as those few rare individuals who have realized it. This unique ability of the eternal essence to illumine ignorance is why Shri Krishna calls it “beyond darkness”.
 
So, how can we use our antahakarana, our intellect, mind and senses, to realize that eternal essence? Shri Krishna provides a three step process. We use “jnyaanam”, the means of knowledge indicated in the twenty attributes such as humility mentioned earlier in the chapter, to gradually reduce the importance we give to upaadhis or conditionings. As we systematically study the scriptures under the guidance of a teacher, the eternal essence comes into our awareness as “jneyam”, the object of knowledge. But only through constant contemplation, reflection and meditation does the eternal essence becomes “jnyaanagamyam”, the goal of knowledge, where all notions of duality are removed and we remain established in the eternal essence.
 
Shri Krishna concludes this shloka by reminding us that all these three stages - preparation, study and reflection - are enabled only through the intellect, which is referred to here as the “hridi” or heart of all human beings. Only humans have the capability to access the eternal essence. That is why we come across the statement “a human birth is rare to attain” in many prominent spiritual texts.