This sign is really about faith. If you pray and believe, then you cannot continue to worry about the thing you prayed for. Praying and believing does not mean expecting God to do everything. Here is a great story that illustrates this point:
A man was trapped in his house during a flood. He began praying to God to rescue him. He had a vision in his head of God’s hand reaching down from heaven and lifting him to safety.
The water started to rise in his house. His neighbor urged him to leave and offered him a ride to safety. The man yelled back, “I am waiting for God to save me”. The neighbor drove off in his pick-up truck.
The man continued to pray and hold on to his vision. As the water began rising in his house, he had to climb up to the roof.
A boat came by with some people heading for safe ground. They yelled at the man to grab a rope they were ready to throw and take him to safety. He told them that he was waiting for God to save him. They shook their heads and moved on.
The man continued to pray, believing with all his heart that he would be saved by God. The flood waters continued to rise. A helicopter flew by and a voice came over a loudspeaker offering to lower a ladder and take him off the roof. The man waved the helicopter away, shouting back that he was waiting for God to save him. The helicopter left.
The flooding water came over the roof and caught him up and swept him away. He drowned.
When he reached heaven and asked, “God, Why did you not save me? I believed in you with all my heart. Why did you let me drown?”
God replied, “I sent you a pick-up truck, a boat and a helicopter and you refused it all. What else could I possibly do for you?!”