[And the variation]—meaning: And in the variation [of the night and the day, and what Allah sends down from the sky of provision]—meaning: rain, for in it is the provision of the creation—[and He gives life thereby to the earth after its death]—after it had been dry, containing no vegetation.
[And the directing]—meaning: the altering [of the winds] in mercy and in punishment—[are signs for a people who use their reason], and they are the believers.