According to Spinoza, man's attainment of happiness, virtue, and a decent life only comes with an enlightened mind and sound thinking. This means that a person’s rational organization of his life and behavior is the only way to reach happiness, virtue and a dignified life, not the pursuit of fame, pleasure and wealth.
Thus, rationality is the goal of human life and is also a means to this goal.
As for reason and faith, faith and philosophy are different for him, and reason is not a servant of theology.