Final answer:
Giuseppe Mazzini believed that Italy needed strength in order to establish a new republic and achieve independence.
Step-by-step explanation:
Giuseppe Mazzini believed that Italy "has need of strength before all things" because he wanted to create a strong and unified Italian nation that could throw off the tyranny of foreign monarchs and the authority of the pope. He believed that the strength of the Italian people would be the foundation for establishing a new republic and achieving independence.