The person who really trusts God about his protection and deliverance from trouble, is able to relax, and go to bed. What is the proof that a Christian really trusts in God, for his protection and deliverance from trouble? The proof is if that Christian, is able to sleep during the night.
When we read the book of Acts chapter 12, and verses from 1 to 11, we can see, that Apostle Peter, was captured by king Herod, and was put in prison. Now, the reason Herod did that, is because he had started to persecute some Christians, and he even killed James, the brother of John. Therefore, he also decided to find Peter, and shut him in prison.
When we read what actually happened to Peter, while he was put in prison, we will find him relaxing, and going to bed, to sleep. What is important for us to notice here, is that Peter surely knew, that king Herod, was persecuting Christians, and that he even killed James, the brother of John. Now, just knowing that fact, would be enough for Apostle Peter, to start worry and be gripped with anxiety, about his own safety and about his life. Peter probably thought, that if Herod killed James, the brother of John, he could kill him too, in order to please the Jews.
But what we find when we read Acts 12:1-11, is that Peter instead of worrying and being anxious about being killed by Herod, decided to go to bed. Now, that I believe, is a complete trust in God. I believe that Peter perhaps even did not care about his life anymore, but believed that whatever happened to him, if he was killed by Herod, he would go to heaven, but if he was not killed, he would continue to preach the Gospel, and that is what all mattered to Peter, at that time in prison.
Remember that Peter, was scared for losing his own life, when he denied Jesus three times, and was trying to pretend, that he did not know Jesus. Peter did that, because he was worried that the Jews could crucify him too, just like his master Jesus was. But that was before the day of Pentecost, or before the day after the resurrection of Jesus, when the Apostles were filled and baptised, with the Holy Spirit. Since the baptism of the Holy Spirit, on the day of Pentecost, Peter has become a different man, bold and courageous, by the Holy Spirit in him, and that is what made him not worry about losing his life, anymore.
Could you as a Christian, be able to sleep, if you were put in prison, and if you knew that you could be killed, because of your faith in Christ? Peter did, and the proof that he was completely trusting God, no matter what happened to him, is in the fact, that he went to bed, and was sound asleep. And that is when God sent an angel, which took him out of prison, in a miraculous way.
Faith and trust in God, will bring peace and a sound sleep to a Christian, even in the time of persecution, just like Peter was. But a lack of faith or trust of God, for his protection and deliverance, will bring plenty or worry and anxiety, and inability to sleep, and have a sweet dreams.