Purity and the Heroic Moment

To grow in purity a priest told me I need to get out of bed and pray the morning offering as soon as I wake in the morning, read the Bible every day, and fast one day a week. It has been eye-opening to observe how hard it is for me to do these things, especially the morning offering. I had almost rather pray a holy hour later in the day than get out of bed at once and pray a quick prayer. I suppose that's why it's called the heroic moment. 

Edit: It seems St. Josemaria Escriva calls it rather the heroic minute.