You have set all the borders of the earth: you have made summer and winter.
Read Chapter 74
Augustine of Hippo
17. "Thou hast made all the ends of the earth" (ver. 17). ...Behold in what manner He hath made the ends of the earth, that hath wrought Salvation in the midst of the earth. "Thou hast made all the ends of the earth. Summer and spring Thou hast made them." Men fervent in the Spirit are the summer. Thou, I say, hast made men fervent in the Spirit: Thou hast made also the novices in the Faith, they are the "spring." "Summer and Spring Thou hast made them." They shall not glory as if they have not received: "Thou hast made them."