When we see our fellow human beings not loving God, we are saddened.
With grief we do absolutely nothing. Not even with the hints. This is not right either.
There is a secret; if we come to understand it, we will help ourselves.
The secret is our prayer, our devotion to God, so that His grace may work.
With our love, with our longing in the love of God, we will receive the grace so that it embraces those close to us, awakens them, make them reach the divine love.
Or rather, God will send His love to awaken them all.