Bitter or boring evangelisers will not help the Gospel or the Catholic Church, Pope Francis said.

The Church and the Gospel will only "move forward with evangelisers (who are) joyful, full of life," the Pope said on January 28.

Christians must not be afraid or embarrassed to express the true joy that comes from having received the Word of God, the Pope said at morning Mass in the chapel of the Domus Sanctae Marthae.

The Pope focused his homily on the day's first reading from the Second Book of Samuel, which describes the festive and joyous atmosphere that comes with the return of the ark of God.