Arjuna said
yo 'yam yogas tvaya proktah
samyena madhusudana
etasyaham na pasyami
cancalatvat sthitim sthiram
Translator: , "O Madhusudana, the system of yoga which You have summarized appears impractical and unendurable to me, for the mind is restless and unsteady." (Bg. 6.33)
But the Lord says:
mad-gatenantaratmana
sraddhavan bhajate yo mam
sa me yuktatamo matah
"Translator: Of all yogis, he who always abides in Me with great faith, worshiping Me in transcendental loving service, is most intimately united with Me in yoga, and is the highest of all." (Bg. 6.47)
So one who thinks of the Supreme Lord always is the greatest yogi(devotees), the supermost jnani, and the greatest devotee at the same time. The Lord further tells Arjuna that as a ksatriya(warrior) he cannot give up his fighting, but if Arjuna fights remembering Krishna, then he will be able to remember Him at the time of death. But one must be completely surrendered in the transcendental loving service of the Lord.
We work not with our body, actually, but with our mind and intelligence. So if the intelligence and the mind are always engaged in the thought of the Supreme Lord, then naturally the senses are also engaged in His service. Superficially, at least, the activities of the senses remain the same, but the consciousness is changed. The Bhagavadgita teaches one how to absorb the mind and intelligence in the thought of the Lord. Such absorption will enable one to transfer himself to the kingdom of the Lord. If the mind is engaged in Krishna's service, then the senses are automatically engaged in His service. This is the art, and this is also the secret of Bhagavad-gita: total absorption in the thought of Sri Krishna.
Writing on mythology and its best choice is Bhagavad Gita"
source: Bhagavad gita As It Is