Final answer:
Desiderius Erasmus was indeed the best known Christian humanist, advocating for using classical and Christian teachings to encourage inner piety and moral reform.
Step-by-step explanation:
True: Desiderius Erasmus was the best known Christian humanist. During the Northern Renaissance, Christian humanism emerged as a branch of the larger humanist movement, emphasizing the study of classical works alongside early Christian texts to enhance spiritual life and moral integrity. This movement, unlike its largely secular counterpart in Italy, aimed to reform individuals' inner lives and, consequently, the Church by advocating for an understanding of Christian teachings and applying them to daily life. Erasmus, a leading figure in this movement, believed that inner transformation was more important than external religious practices. His work encouraged the use of classical knowledge to improve one's piety and live a virtuous Christian life.