José Gomez, archbishop of Los Angeles, commemorated the feast of the Most Holy Trinity, which refers to God, Jesus and the Holy Spirit being three persons in one, by sending out a tweet explaining the Trinity in a nutshell.

“Our God is the Father who creates us,” the tweet said. "He is the Son who came into our world to share his life with us. And he is the Spirit who gives us a new life as children of God and causes the Trinity to dwell in our hearts.”

Catholics celebrate the Feast of the Holy Trinity on the Sunday after Pentecost Sunday, which shifts on the calendar in tandem with Easter. Britannica traces the roots of the Holy Trinity feast day to as early as the 10th century.

The mystery of the Holy Trinity is a basic tenet of the Catholic faith. It says that there is only one God, but three divine persons: God the Father, God the Son and God the Holy Spirit, Catholic Culture says. God the Son, or Jesus, was begotten from the Father, and the Holy Spirit proceeds from both the Father and the Son. 

"The #MostHolyTrinity teaches us that a person can never be without the other," Pope Francis said in a tweet about the celebration. "We are not islands, we are in the world to live in God’s image: open, in need of others and in need of helping others.” 

Pope Francis followed that up with another tweet. "If we can truly invoke God, calling him ‘Abba — Dad’, it is because the Holy Spirit dwells in us; he is the One who transforms us deep within and makes us experience the soul-stirring joy of being loved by God as his true children,”  the pope wrote.