אַתָּ֣ה הִ֭צַּבְתָּ כָּל־גְּבוּל֣וֹת אָ֑רֶץ קַ֥יִץ וָ֝חֹ֗רֶף אַתָּ֥ה יְצַרְתָּם׃
Thou hast set all the borders of the earth; Thou hast made summer and winter.
Read kabbalistic (mystical) interpretation of Psalms 74:17: and classical mystical sources.