Haec sancta

Haec Sancta refers to a Latin phrase that translates to "This Holy Thing." Imagine you are sitting in church on Easter Sunday and the priest takes out a very important book. This book is called the Gospel Book and you might notice that it has a beautiful cover and shiny gold pages.

Suddenly, the priest stands up and holds the book up high for everyone to see. He says "Haec Sancta" because he wants to tell everyone that this book is very important and holy. The priest reads from the book and teaches everyone some important lessons about how Jesus rose from the dead.

So, whenever someone says "Haec Sancta," it is usually about something very holy and important, like the Gospel book in church. It's a way of telling people that they should pay attention because what they're about to hear is very special and significant.