This tree of devotional service is not of this material world. It grows in the spiritual world, where there is no distinction between one part of the body and another. It is something like a tree of sugar, for whichever part of such a tree one tastes, it is always sweet. The tree of bhakti has varieties of branches, leaves and fruits, but they are all meant for the service of the Supreme Personality of Godhead. There are nine different processes of devotional service (sravanam kirtanam visnoh smaranam pada-sevanam arcanam vandanam dasyam sakhyam atma-nivedanam), but all of them are meant only for the service of the Supreme Lord. Therefore whether one hears, chants, remembers or worships, his activities will yield the same result. Which one of these processes will be the most suitable for a particular devotee depends upon his taste.