SB 1.6 - Chanting is the main anga of bhakti

Those who are full of cares and anxieties due to desiring contact of the senses with their objects can cross the ocean of nescience on the boat of constant chanting of the transcendental activities of Lord Hari (haricarya). Materialistic men are always busy thinking and discussing subjects of sense gratification. Such sensual activities, being carried out under the influence of māyā, do not give them any satisfaction. On the contrary, they become full with cares and anxieties. That which cannot give them satisfaction is accepted as an object for satisfaction. If one wants actual happiness, one must change the subject matter to discussing about the Lord. The Lord descends on earth and manifests activities almost like worldly men, but at the same time He does things in an extraordinary way. He does so for the benefit of all conditioned souls so that they can turn their attention to transcendence. Nārada, by his personal experience, has stated that by discussing the Lord’s activities, one can cross over the ocean of nescience. Because kīrtanam is the main aṅga of bhakti, it is mentioned. However, all limbs of bhakti will be effective.