Gita advocates 4 paths in spirituality that are Gyana, Raja, Karma and Bhakti Yoga based on the 4 varnas/dishas/directions that were created by God initially based on Nirguna Purusha and Triguna Prakriti out of which is dominant in all the souls, which are
Gyana Yoga for Nirguna (consciousness in Soul/Purusha)
Raja Yoga for Satva Guna (consciousness in Intellect)
Karma Yoga for Rajas Guna (consciousness in Mind)
Bhakti Yoga for Tamas Guna (consciousness in Body)
All paths in spirituality lead to same fruit. These paths also translates to 4 yugas/varnas which are Nirguna Satyuga(Brahmin), Satva Treta(Kshatriya), Rajas Dvapra(Vaishya) and Tamas Kaliyuga(Shudra). Since, its kaliyuga, age of Tamas and ignorance, Bhakti is recommended for masses as fruitless action is not possible by majority because mankind of Kaliyuga is unable to understand that soul is the real self, not the body. And renouncing fruits of actions are for those seeking Moksha and self/spirit-realization, not the worldly people who are not yet saturated with matter. Read entire chapter 2 and 3 also.
Bhagavad Gita 2.51 The wise endowed with equanimity of intellect,
abandon attachment to the fruits of actions, which bind one to the
cycle of life and death. By working in such consciousness, they attain
the state beyond all suffering
Bhagavad Gita 2.53 When your intellect ceases to be allured by the
fruitive sections of the Vedas and remains steadfast in divine
consciousness, you will then attain the state of perfect Yog
Bhagavad Gita 3.22 There is no duty for me to do in
all the three worlds, O Parth, nor do I have anything to gain or
attain. Yet, I am engaged in prescribed duties.
Bhagavad Gita 3.27 All activities are carried out by the three modes
of material nature. But in ignorance, the soul, deluded by false
identification with the body, thinks itself to be the doer.
Bhagavad Gita 3.28 O mighty-armed Arjun, illumined persons distinguish
the soul as distinct from guṇas and karmas. They perceive that it is
only the guṇas (in the shape of the senses, mind, etc.) that move
amongst the guṇas (in the shape of the objects of perception), and
thus they do not get entangled in them.
Bhagavad Gita 3.29 Those who are deluded by the operation of the guṇas
become attached to the results of their actions. But the wise who
understand these truths should not unsettle such ignorant people who
know very little.
Bhagavad Gita 3.30 Performing all works as an offering unto me,
constantly meditate on me as the Supreme. Become free from desire and
selfishness, and with your mental grief departed, fight!
When Krishna started discoursing Gita, he started from high note that is Gyana Marg with knowledge of Samkhya, Aatma and Yoga but later realizing Arjuna's inability to understand through Gyana because of Dvapra Yuga, shifted towards advocating simpler Bhakti Marg in later chapters. Mind is what makes an individual, what you think you become.Instincts-ego of mind-body, reasoning of intellect and soul of God co-exist in every individual for the same reason i.e. truth.
When you hear a man say "I am inspired," and then talk irrationally,
reject it. Why? Because these three states —instinct, reason, and
super-consciousness, or the unconscious, conscious and super-conscious
states—belong to one and the same mind. There are not three minds in
one man, but one state of it develops into the others. Instinct
develops into reason, and reason into the transcendental consciousness
; therefore not one of the states contradicts the others. Real
inspiration never contradicts reason, but fulfils it. Just as you find
the great prophets saying, "I come not to destroy but to fulfil," so
inspiration always comes to fulfil reason, and is in harmony with it.
The greatest error is to call a man a weak and miserable sinner. Every
time a person thinks in this mistaken manner, he rivets one more link
in the chain of avidya that binds him, adds one more layer to the
“self-hypnotism” that lies heavy over his mind
Never think there is anything impossible for the soul. It is the
greatest heresy to think so. If there is sin, this is the only sin —
to say that you are weak, or others are weak.
Hold to the idea, “I am not the mind, I see that I am thinking, I am
watching my mind act,” and each day the identification of yourself
with thoughts and feelings will grow less, until at last you can
entirely separate yourself from the mind and actually know it to be
apart from yourself.
If you think that you are bound, you remain bound; you make your own
bondage. If you know that you are free, you are free this moment. This
is knowledge, knowledge of freedom. Freedom is the goal of all nature.