The human race is very fragile like "clay jars", but possess great interior riches, Pope Francis has said.
"We are all jars of clay, fragile and poor, yet we carry within us an immense treasure," Francis wrote on Twitter.
The Pope now has more than 7.2 million followers on his Twitter account @Pontifex, according to the Vatican.
The papal tweets are published in nine languages on the microblogging website.
The Argentine Pope's tweets in Spanish have the highest number of followers (2.73 million), followed by his English tweets (around 2.6 million), the Vatican said.