Two things inspire me to awe: the starry heavens and the moral universe within.

If Einstein said this, he was almost certainly quoting philosopher Immanuel Kant's words from the conclusion to the Critique of Practical Reason (1788), translated in Paul Guyer's The Cambridge Companion to Kant (p. 1) as: "Two things fill the mind with ever new and increasing admiration and awe, the more often and steadily we reflect upon them: the starry heavens above me and the moral law within me."