In Luke 12:4-7, Jesus told His followers not to fear those who can harm them because God is ultimately in control. God cares greatly about His followers when they experience pain and suffering. This stems from the watchful care God has for all of His creation. The Almighty who keeps the planets in their orbits is at the same time aware of a lowly sparrow that falls to the ground. Since He is even aware of what most would consider an insignificant event, how much more is He aware of the concerns of His children?
As Jesus said, “You are of more value than many sparrows.” Jesus pointed out that “five sparrows [are] sold for two copper coins” (Luke 12:6). As for your value, Jesus died on the Cross to save you from sin and eternal separation from God. Having died for you, Jesus commits Himself to caring for you. He cares so much for you He even knows how many hairs are on your head.
When you name Jesus as your Savior and honor Him with your life, you need not fear anything in this world. You can rest easy knowing that God’s caring eye is watching over you. This knowledge should make us "sing because we are happy".
"Therefore I tell you, do not worry about your life, what you will eat or drink; or about your body, what you will wear. Is not life more than food, and the body more than clothes? Look at the birds of the air; they do not sow or reap or store away in barns, and yet your heavenly Father feeds them. Are you not much more valuable than they?" Matthew 6:25-26 (NIV)