Faith is having confidence in the future and security in the invisible. Faith is what makes God proud of us. The Bible highlights Abraham for his faith, particularly when it comes to leaving his home in Ur to travel west. He is mentioned in Romans 4 and Hebrews 11 because of the faith that was needed to follow God's guidance.
The story of Joshua and Caleb has many lessons for you and me and about how we live a life of faith. Let us remember that faith involves risks, faith can be expensive, faith looks to God, faith often requires waiting, and yet faith results in a fruitful life.