Letter to Isaac Leeser The letter begins by posing rhetorical questions about the fleeting nature of earthly pleasures compared to the eternal joys of Heaven. It emphasizes the importance of prioritizing spiritual matters over worldly possessions and suggests ways to achieve this, including daily Bible reading, obedience to God's commands, self-denial, and charity. The letter then addresses the idea that Judaism lacks spirit and the concept of a redeemer, arguing that such claims are blasphemous and that Jewish scripture contains all the spiritual elements attributed to Christianity. It asserts that God is the ultimate redeemer and physician, and it concludes with a call for repentance and seeking God while He may be found, quoting passages from Isaiah.