Man was put into the Garden of Eden to till and to keep it (Genesis 2:15), as it is written:
"To till it" means the 248 positive mitzvot, "to keep it" means the 365 negative mitzvot.
Just as the work of the gardener makes the earth give forth greater fruit and abundance, so does man draw forth the utmost joy and goodness from life by proper cultivation of Torah and mitzvot.
–Rabbi Adin Steinsaltz
From The Candle of God, p. 8, by Rabbi Adin Steinsaltz