Observation: The gospel of Luke ends with this ... after Jesus' ascension, the disciples wait in Jerusalem for the Holy Spirit, and they spend their days in the temple, worshipping and praising the Lord. This is very different than the fractured and fearful group huddled in the upper room immediately after the crucifixion. At that time, the disciples were afraid for their lives, and doubtful of everything they had believed. Those who wandered out - like the two who went to Emaus - talked of their confusion, sadness, and lost hope.
However, now secure in their faith and understanding the true nature of Jesus, they are boldly standing in the most public place in Judea. They do so with "great joy", and they publicly show themselves to be praising God. This would have been irrational to those around them, knowing them as disciples of Jesus who was crucified, and it would have been visible to the very authorities - both Jewish and Roman - who had taken such drastic action to suppress Jesus. They are doing this because ... they know the truth, and that truth gives them joy and hope and peace and faith that cannot be kept secret or quiet.
Application: True faith in Jesus as Messiah - true understanding of the gospel and of the hope we have by faith - must always be publicly evident. It cannot be a secret, like a lamp under a basket. Faith is, and must be, part of who we are every day, and thus seen by everyone.
I discuss my faith ... maybe not boldly or repeatedly in every public setting, but it is known to others. It comes up in work settings, and though I work in a time and place where I have been personally and professionally attacked for my faith, it is known I am a believer. However, I am not exactly in the middle of the city singing praise and declaring that faith in a loud voice. I do most of my worship alone and unseen. And my default words to anyone in need of encouragement - while coming from a heart that desires to love them like Jesus - typically will not include the name of Jesus or a pronouncement of Christian hope.
I could be more public in my faith. And true faith is always public as part of who I must authentically be.
Prayer: Lord, culture today says we must accept everyone's "authentic self". Well, I am a disciple of Jesus, with faith and hope in you. I will bring that forward more. I do know how it will really be received and responded to by others, but that is not important. My faith will be public. Amen.