Since the Lord is absolute, there is no difference between His name and His actual form. In the material world there is a difference between form and name. The mango fruit is different from the name of the mango. One cannot taste the mango fruit simply by chanting "mango, mango, mango." But the devotee who knows that there is no difference between the name and the form of the Lord chants Hare Krsna, Hare Krsna, Krsna Krsna, Hare Hare / Hare Rama, Hare Rama, Rama Rama, Hare Hare and realizes that he is always in Krsna's company.

From Srila Prabhupada's Krsna Book ch. 2: Prayers by the Demigods for Lord Krsna in the Womb