During the time of Rama, did Hanuman and others perform the great feats by the power of His Name alone ?
Once Anjana Devi, mother of Anjaneya (Hanuman) came to the residence of Kausalya. Kausalya enquired who she was. Anjana Devi introduced herself saying, "I am the mother of Anjaneya, who could cross over the mighty ocean in a leap." After some time, the mother of sage Agastya also came there. On being asked, she introduced herself saying, "I am the mother of the one who swallowed the entire ocean in one gulp." Then Kausalya said to them, "Your sons could accomplish such stupendous tasks because of the mighty power of the Name of my son, Rama." As they were conversing, Rama appeared there and asked, "Mother, what is that you are discussing?" Kausalya replied, "Son, we are discussing the glory of Your Name." Then Rama said, "Mother, it is not merely because of My Name that they were able to perform such mighty tasks. Their purity of heart was also responsible for this. There are many who chant My Name, but are all of them able to reap its benefits? Purity of heart is very essential."(SSS Vol 34, pg 84)