We all ought to take care, and be cautious in all that we do. However ,when it comes to stating our claims as believers, we should not care so much for our lives that we cringe and deny our faith or be silent ,keeping it low.
Jesus had just finished telling His disciples to shout on the roof tops all that He had taught them. Encouraging them not to fear the then Jewish leaders who are able to kill their bodies, they should rather be courageous and speak up in defeat of the devil that can destroy both body and soul, IF THEY KEEP SILENT.
Are you stating your claim?
And fear not them which kill the body, but are not able to kill the soul: but rather fear him which is able to destroy both soul and body in hell. Matthew 10:28