Rabbi Ovadia Yosef adopts the Talmudic dictum that "the power of leniency is greater." Therefore, one of his fundamental principles of halakhic (Jewish Law) ruling is that lenient rulings should be preferred over chumra (strictly).
Rabbi Yosef sees this as one of the distinguishing characteristics of the Sephardic approach to Halakha compared to the Ashkenazi approach. In one of his rulings, he quotes Rabbi Chaim Joseph David Azulai as saying: "The Sephardim are seized by a measure of piety and therefore are lenient in the Halakha, and the Ashkenazim are seized by a measure of bravery and therefore they rule strictly."