The light of the first day is the infinite energy of God which preceded the tzimtzum | The difference between the quality of Godly light in 'tohu' compared to 'tikun' is like the difference between אור אין סוף שלפני הצמצום and the limited אור הקו | Two reasons why 'tohu' is characterized by chesed and 'tikun' by gevurah: (1) Tohu - unlimited revelation of godliness without contraction - chesed, tikun - limited revelation through concealment - gevurah. (2) Tohu - revelation without the veil of vessels - chesed, tikun - revelation concealed by the veil of vessels | The difference in souls between time of temple and time of exile | Unique quality of the vessels of atzilus • Link to view this page of the maamar: www.hebrewbooks.org/pdfpager.aspx?req=31640&st=&pgnum=57 •