Philo Judaeus De Migratione Abrahami 185

[185] Descend therefore from heaven, and when you have come down, do not, on the other hand, employ yourselves in the investigation of the earth and the sea, and the rivers, and the natures of plants and animals, but rather seek to become acquainted with yourselves and your own nature, and do not prefer to dwell anywhere else, rather than in yourselves. For by contemplating the things which are to be seen in your own dwelling, that which bears the mastery therein, and that which is in subjection; that which has life, and that which is inanimate; that which is endowed with and that which is destitute of reason; that which is immortal, and that which is mortal; that which is better, and that which is worse; you will at once arrive at a correct knowledge of God and of his works.