Gita is the ultimate book to know how should one live his life. Gita focuses on Karma Yoga and in Gita Krishna asks Arjun to engage in war i.e. Krishna didn't tell Arjun to do only Bhakti of him. I am asking if in Gita or anywhere Krishna or for that matter any god has said that engaging in worldly activities is also necessary apart from Bhakti to the God ?
Although some examples exist of such persons who used to do only bhakti of God and not anything else eg- Mirabai, who abandoned her worldly duties and used to do only Bhakti of Krishna. Not sure, but I think Prahalad is also such a example.
So, My question is Can a person do only bhakti of god and not do anything else in his life ? Or Is engaging in worldy affairs also necessary ?