Right - That which is upright or just. Conformable to God's standards and thus worthy of his approval. Pure - This emphasizes moral purity. Lovely - Occurs only here in New Testament. What is pleasing, agreeable, amiable.
Modern society has an infatuation with the margins of society, with violence and degradation.
Christians still believe there is beauty in God's good creation. What is praiseworthy, attractive, and what rings true to the highest standards. When we continually center our minds on such thoughts as these, we shall live like Christians. We need to have thought control. We need to think about such things.