How to develop a feeling for His presence? By doing His Mitzvohs when in private with as least as much fervor and enthusiasm as in public. Also to keep the halachos of tznius when in the innermost privacy of one’s home, bearing in mind that you’re always in the presence of HaShem. ??? ???? ??? ????????, actions bring a person to change, to feel, to experience. Which is the reason explicitly stated in the Torah, ???? ???? ?? ? or ???? ???? ???? ?’ ????, doing His Mitzvohs bring a person closer to his awareness of HaShem.
Big Tzadikim, after years of Avodah, develop a more sublime sense of Ruach Hakodesh, they can actually feel His Presence. As enumerated in the last Mishnah in Sotah, it’s a process, a long, hard process until Ruach Hakodesh – BUT IT IS ATTAINABLE.