Tayumanavar, in one of his songs, refers to the three processes, ‘shravaNa, manana and nidhidhyAsana’.
Tirumoolar follows the ‘shravaNa’ word by *guru-vuru-cintittal* meaning the memorisation of the mantra taught by the guru. The Tamil word *uru* here means mantra-japa that is manana.
By thus memorising and repeating the mantra one is automatically led on to the next stage of ‘nidhidhyAsana’.
There is an old saying *sannyasya shravaNaM kuryAt* -- one should do the ‘listening’ part only after taking up sannyAsa.