Raga and Dvesha (likes and dislikes) only constitute this Samsara or this world of phenomena. It can be totally destroyed by knowledge of Brahman (Supreme Self).
Raga-Dvesha is a Vasana. It has four states. Raga-Dvesha, Vasanas, Samskaras and Gunas are intertwined. They co-exist. The seat of Raga-Dvesha is the mind and the senses. Destruction of one will lead to the destruction of others. But the destruction of the source, Avidya or Ajnana, the seed of Samsara, through Brahma-Jnana will destroy everything to the very root.
The cultivation of virtues like Maitri (friendship), Karuna, (mercy), Mudita (complacency) and Upeksha (indifference) can thin out or attenuate Raga-Dvesha. This is the Pratipaksha-Bhavana method or cultivation of the opposite positive qualities, of the Raja Yogins. Destruction of Avidya will lead to the destruction of. Raga-Dvesha. Raga and Dvesha are the modifications or effects of Avidya or ignorance.
The fire of devotion also can burn in toto Raga-Dvesha.
The practice of Nishkama Karma Yoga or disinterested selfless service can thin out Raga-Dvesha to a very great extent.
Kill Raga (attachment) by the sword of Vairagya (non-attachment or dispassion or indifference to sensual objects) and Dvesha by developing cosmic love.
Raga-Dvesha assumes various forms. You like certain foods and dislike certain other foods. You like certain clothing and dislike certain other clothing. You like certain persons and dislike certain other persons. You like certain places and dislike certain other places. You like certain sounds and dislike certain other sounds. You like certain colours and dislike certain other colours. You like soft things and dislike hard things. You like praise, respect, honour, and dislike censure, disregard, dishonour. You like a religion, view, opinion and dislike other religions, views and opinions. You like comforts, pleasures, and dislike discomforts and pain. Thus there is no peace of mind for you as the mind is ever restless and agitated. The waves of Raga-Dvesha are ever disturbing the mind. One wave of Raga-Dvesha arises in the mind and subsides after some time. Again another wave rises, and so on. There is no balance of mind. There is no peace. He who has destroyed Raga-Dvesha will be ever happy, peaceful, joyful, strong and healthy. Only he who is free from Raga-Dvesha will have a long life. Raga-Dvesha is the real cause for all diseases (Adhi and Vyadhi).
Wherever there is pleasure, there is Raga; wherever there is pain, there is Dvesha. Man wants to remain in close contact with those objects which give him pleasure. He shuns those objects which give him pain.
Though the objects that give pain are far away from you, the memory of the objects will give you pain. It is only the removal of the currents of Dvesha that will give you happiness. It is the Vritti or thought-wave that gives pain but not the objects. Hence try to destroy the current of Dvesha by developing cosmic love and Brahma-bhavana or Isvara-bhavana in all objects. Then the whole world will appear to you as the Lord in manifestation. The world or the worldly object is neither good nor bad, but it is your lower instinctive mind that makes it good or bad. Remember this point well, always. Do not find fault with the world or the objects. Find fault with your own mind.
Destruction of Raga-Dvesha means destruction of ignorance or mind and the idea of the world.
No meditation, no peace, no Samadhi is possible for a man who has not removed these two currents two foes of peace, knowledge and devotion. He who says “I enter into deep meditation. I have attained Self-realisation and Samadhi. I can also help you to enter into Samadhi” is a confirmed hypocrite. If you find in him Raga-Dvesha, attachment, hatred, prejudice, intolerance, anger, irritability, know him to be a Mithyachari. Shun his company. Remain at a respectable distance from him, because you also will catch the infection or contagion from him. Beware. Beware. Be cautious, friends! (Excepts from Swami Sivananda’s Vedanta for beginners)