There is in fact no difference between bhakti and vichara

Ramana Maharishi:  So long as there is duality, there must be God and devotee. Similarly also in vichara. So long as there is vichara, there is duality too. But merging into the Source there is unity only. So it is with bhakti too. Realising the God of devotion, there will be unity only. God too is thought of in and by the Self. So God is identical with the Self. If one is told to have bhakti for God and he does so straightaway, it is all right. But there is another kind of man who turns round and says: “There are two, I and God. Before knowing the far-off God, let me know the more immediate and intimate ‘I’.” For him the vichara-marga has to be taught. There is in fact no difference between bhakti and vichara.