3 Nephi 19:24 shows us how to pray. Few words for they were given what to pray and they were filled with desire. This is a heart experience. 3 Nephi 19:33 shows what happens when our hearts are filled with desire, their hearts are opened and they understand in their hearts. When I have my most meaningful prayers, my mind is calm, my desires are pure, focused, full of faith and belief and my desires are solely upon the Lord and His will. I understand the answers in my heart. As President Packer has explained, "The Holy Ghost speaks with a voice that you feel more than you hear." (https://www.lds.org/general-conference/1994/10/personal-revelation-the-gift-the-test-and-the-promise?lang=eng).