He who sacrifices freedom for security deserves neither.

Invert, always invert: Turn a situation or problem upside down. Look at it backward.

译文：做事顺乎义理，就容易见效，行动违背时势，就难以成功。赏析：我们做任何事都要顺应时势、把握事物发展的规律。违背天道，逆天而为，都是不可取的。

The application scenarios of drones far exceed our imagination.

"The stars are brightest when the night is darkest."