Here goes some of the shlokas (couplets) from the Gita...along with their meanings....the numbers on the top of each give the chapter-verse.
1-17Avinashi Tu Tadvidhi Yena SarvamidanTatam
Vinashamvyayasyasya Na Kaschit Kartumarhati
By whom the entire body is pervaded is indestructible.
Noone can destroy the immortal soul.
1-19Ya Enan Vetti Hantar Yashrvyanan Manyate Hatam
Ubhau Tau Na Vijanito Nayan Hanti Na Hanyate
One who thinks the soul is the slayer and one who thinks the soul is slain, both are ignorant.
The Soul never slains nor is slain.
1-23Nainan Chindanti Shashtrani Nainan Dahati Pavakah
Na Chainan Klyedyantapo Na Shoshyati Marutah
Weapons cannot harm the soul, Fire cannot burn the it
Water cannot wet it, air cannot dry it
2-47Karmanyevadhikaraste Ma Phaleshu Kadachan
Ma Karmaphalheturbhuta Ma Te Sanghostaviswakaramani
Only doing your duty, your karma is in your right, never think about the results
Never attach your works with the thought of getting the results
2-55Prajhati Yada Kaman Sarvan Partha Manogatan
Atmanyevyatmana Tushth Sthitapragyastadochyate
One who gives up all the desires for gratification of senses within the mind, and becomes satisfied with the realization of the Self in the pure state of the soul
Then the one properly stays in the state of complete knowledge
4-6Ajopi Sanvayayatma Bhutanamishvaropi San
Prakritin Swamdhishtay Sambhavamyatmamayaya
Although being birthless, imperishable and immutable, the Lord of all living things
Being so, I appear in the world in my original transcendetal form by my internal potency
4-7Yada Yada Hi Dharmasya Glanirbhavati Bharata
Abhiyutthanamdharmasya Tadatmanam Srijamyaham
Whenever there is a decline in righteousness
To eradicate unrighteousness, I appear in the world
4-8Paritranay Sadhunam Vinashay Cha Dushkritam
Dharmasansthapanarthay Sambhavami Yuge Yuge
To protect good, to end bad
To establish righteousness, I appear at times
Those whose illusions are dispelled by illumination, who are endowed with spiritual intelligence
Who medidate on the inner self, whose faith is fixed and who have taken complete shelter of the ultimate truth, attain liberation from the material existence.
5-23Shaknotihaiva Ya Sodum Prak Sharirvimokshanat
Kamkrodhodvawam Vegam Sa Yukta Sa Sukhi Narah
One who is able to neutralize in this life, the physical, mental and emotional urges generated from desire and passion, before the death of the body; he is fully self controlled and certainly happy.
6-6Bandhuratmatmanastasya Yenatmaivatmana Jitah
Anatmanstastu Shatrutve Vartetatmaiva Shatruvat
For the One who has conquered the mind, the mind is the best friend
But for the one whose mind is uncontrolled, it is his worst enemy
9-4Maya Tatmidam Sarvam Jagadavyaktamurtina
Matsthani Sarvabhutani Na Chaham Teshvavasthitah
The entire universe is pervaded by Me, in an imperceptably subtle manifestation
And all living entities find their support in Me, but I am not supported in them.
12-15Yasmannodvijate Loko Lokannodvijate Cha Yah
Harshamarshabhayodvegairmukto Yah Sa Cha Me Priyah
One who never disturbs the world, who never is never diturbed by the world
One who is free from the joy, fear, anxiety; The One is dear to me
13-17Avibhakta Cha Bhuteshu Vibhaktamiv Cha Sthitam
Bhootbhartri Cha Tajgeyam Grasishnu Prabhavishnu Cha
Undivided yet IT appears divided among the living things
It is known as the preserver of living things, the destroyer as well as the creator.
13-23Upadrashtanumanta Cha Bharta Bhokta Maheshwarah
Parmatmeti Chapyukto Deheasmin Purusha Parah
Within the body, superior to the individual consciousness, the Supreme Consciousness dwells as an observer, sanctioner, preserver, enjoyer and the ultimate controller.
15-6Na Tad Bhasyate Suryo Na Shashanko Na Pavakah
Yad Gatva Na Nivartante Taddham Paramam Mama
There is no light of the Sun, none of the Moon or Fire
There is no return from that supreme abode after reaching there once
16-21Trividham Narakasyedam Dvaram Nashanmatmanah
Kaamah Krodhastatha Lobhastasmadetattrayam Tyajet
Three doors to Hell and destruction are Lust, Anger and Greed
Hence they should be abandoned from the self.
17-12Abhisandhay Tu Phalam Dambharthamapi Chaiva Yat
Ijyate Bharatshreshtha Tam Yagyam Vidhi Rajasam
When done for results, pride or money
A sacrifice becomes akin to passion
17-16Manah Prasadah Saumyatvam Maunamatmavinigrah
Bhavsanshuddhirityetat Tapo Manasmuchyate
Serene thoughts, compassion, gravity, self-control, purity of purpose
These are the quality of austere mind