How did john of damascus defend the use of icons during the iconoclast controversy?

he argued that icons were a tool to teach biblical lessons, and that the faithful knew how to use them appropriately.
he argued that using icons represented the main difference between christianity and judaism.
he argued that eliminating the use of icons would damage the reputation of the church.
he argued that it was god's will for icons to be used in religious spaces and personal homes.