Within every person there exist body and soul energies.
The more encompassing and profound one’s connection to the holy words he utters, by exerting both types of energies, the more these words become a part of him, seared forever in his memory and secure within him.
This teaching (from the Tanya), stated specifically in the context of Torah study, is also pertinent to a bond one develops with any holy matter, be it Torah, prayer, or otherwise.
Rabbi Adin Steinsaltz