Today's reading from the Acts of the Apostles tells us that Peter and John could not not speak about Christ:
"Whether it is right in the sight of God for us to obey you rather than God, you be the judges. It is impossible for us not to speak about what we have seen and heard."
St. Dominic was also reported to be constantly speaking about God in his travels from city to city with his fellow friar preachers.
How much do you speak about God in your everyday conversations?