What is the real significance of the Temple in Jerusalem?

Why do Jews mourn loss of Temple nowadays and pray for its restoration?

Tags: Holy Temple
Mordechai Sones ,

Model of Holy Temple
Model of Holy Temple
Rishwanth Jayapaul/ Flash90

When, in June 1967, the IDF soldiers entered the Temple Mount, Judaism's holiest site, located in the Land of Israel, and descended to the Western Wall of the ancient Temple compound, a new era began in Jewish History.

What is the inner meaning of what occurred?

What is the significance of our desire to rebuild the Temple?