Nothing is hidden that will not be known

Today is the Twelfth Ordinary Sunday of Year A. If we read the Gospel (Matthew 10:26-33) out of context, surely we will have a different understanding of Jesus' message.
So have no fear of them; for nothing is covered that will not be revealed, or hidden that will not be known (Matthew 10:26).
From a superficial reading, we may conclude that there is no such thing called "secret" in this world. If you design a secretive, malicious plan against your subordinates, sooner or later, it will be made known to the whole world. You will end up in humiliation instead. In Chinese, we say 「若要人不知，除非己莫為。」Indeed, this feeling immediately surged up in my heart when I read it with my choir members this morning. God is watching over you. He will torpedo your plan at His pleasure.
Is it a correct reading? Did Matthew intend such an understanding? Let's check the context.
In Matthew 10, Jesus chose 12 apostles and sent them out to preach the good news to the Jews. He advised them to be wise and cherish no malicious designs.
Behold, I send you out as sheep in the midst of wolves; so be wise as serpents and innocent as doves.
Beware of men; for they will deliver you up to councils, and flog you in their synagogues,
and you will be dragged before governors and kings for my sake, to bear testimony before them and the Gentiles (Matthew 10:16-18).
The Matthean community was made up of Jewish Christians. They were persecuted by the larger Jewish community because these Christians believed that Jesus is the Son of God. For the Jews, this was blasphemy. The Lord God is one. Curse you Christians for believing in yet another god! Therefore, the Matthean community could only practise their faith underground. They went about secretly, avoiding hostility from their fellow Jews. Just as the Master was persecuted by the Jews, the disciples would meet a similar fate (Matthew 10:24-25). But Jesus assured them that the day would come when Christians would practise their faith in the open (Matthew 10:26-27).
And do not fear those who kill the body but cannot kill the soul; rather fear him who can destroy both soul and body in hell.
Are not two sparrows sold for a penny? And not one of them will fall to the ground without your Father's will.
But even the hairs of your head are all numbered.
Fear not, therefore; you are of more value than many sparrows (Matthew 10:28-31).
Therefore, have no fear of persecutions because they would not come without our heavenly Father's permission. Yet, our heavenly Father would take good care of us. See, even the hairs of our head are all numbered!
Nowadays, we can practise our faith respectably. Outsiders will not persecute us because we believe that Jesus is our Lord and our God. Without this martyrdom context, we need to find new applications for these verses. Therefore, I feel that my superficial reading above is totally legitimate in the modern context. Be mindful of your thoughts and actions so that they do not go contrary to your call to being a follower of Christ, that you do not deny Jesus with your contemptible acts. Make sure that your thoughts and actions do not bring you down into damnation in hell where your body and soul will be cut off from God.

My Advocate, I thank St. Francis for painting us a lofty ideal of being a Christian. Make me an instrument of Your peace. May I be able to cheer up my colleagues in this time of tribulation. I trust that You will give us enough grace to bear the cross imposed on us. Amen.