How did Husserl hope to make philosophy into a rigorous science?

Edmund Husserl sought to establish philosophy as a rigorous science by rejecting both naturalism—which incorrectly applies natural science methods to consciousness—and historicism, which he believed led to unacceptable relativism.1

To achieve this, Husserl developed phenomenology as a method to uncover the essential structures of consciousness and the foundations of meaning. His approach relied on several key principles:12

• The Reduction (Epoché): Philosophers must practice a "suspension of judgment" by placing the existence of the natural world in "brackets." This does not deny the world's existence but shifts the focus from factual objects to the manner in which they are constituted in consciousness.34
• Intentionality: Husserl emphasized that consciousness is always "directed toward" an object. By examining these intentional acts, he aimed to discover the essential structures of experience.12
• Eidetic Reduction: Through the intuition of essences (Wesensschau), he sought to move beyond factual occurrences to grasp the universal, invariant structures of conscious acts.3
• Transcendental Foundation: He argued that philosophy must return to the transcendental ego as the ultimate ground where all meaning is constituted.32

Ultimately, Husserl believed that by thematizing the unquestioned presuppositions of the sciences and analyzing the life-world, philosophy could provide the foundational clarity necessary for all scientific knowledge.2