By faith Noah, when warned about things not yet seen, in holy fear built an ark to save his family. By his faith he condemned the world and became heir of the righteousness that comes by faith.
Hebrews 11:7 (New International Version)
The presence of unholy fear in our lives will cause us to question our abilities and the abilities of God to intervene in our lives. Worry is sin in that it shows lack of faith and a misunderstanding of our connection to God. In reality we can ask in the name of Jesus all that we need and it shall be given to us. The only catch is that we must believe.