"Men go forth to marvel at the height of mountains, and the huge waves of the sea, the broad flow of the rivers, the vastness of the ocean, the orbits of the stars, and yet they neglect to marvel at themselves. Variant: Men go abroad to admire the heights of mountains, the mighty billows of the sea, the broad tides of rivers, the compass of the ocean, and the circuits of the stars, and pass themselves by."

Source: Saint Augustine (2010). “Sermons on the Liturgical Seasons (The Fathers of the Church, Volume 38)”, p.95, CUA Press