The modern means of presenting the faith and evangelisation is very much IT oriented.
So there are online videos, talks, retreats, podcasts, social media and whatever.
But at the time of St. Francis Xavier, which was in the 16th century, the only probably audio-visual aid was the missionary himself and the message of salvation that he was called to proclaim.
That was what St. Francis Xavier had - the gospel message and he was to proclaim it wherever he went.
The only other visual aid was probably the Cross with which he proclaimed the love of God for humanity.
So with only the Cross and the Gospel, St. Francis Xavier went to the East and proclaimed the Good News far and wide, and that is why he is the Patron of Missions and Missionaries.
And there was also this story of how he dropped the Cross into the sea during a storm when he held it against the wind to pray for it to subside.
Later when he landed safely and when he was walking on the beach, he was surprised to find a crab coming towards him, carrying that Cross in its pincers and he gave thanks to God and blessed the crab, which is now known as the "crucifix crab" because of the distinct marking of the cross on its shell.
With the Cross, St. Francis preached the Good News and the love of God wherever he went.
May we look at the Cross and see in it the sign of our salvation and the love of God for us.
And may we also, like St. Francis Xavier, be missionaries of the Good News of salvation and witnesses of God's love to others.