Proverbs 20:7

The righteous man who walks in integrity and lives life in accord with his (godly) beliefs- How blessed (happy and spiritually secure) are his children after him (who have his example to follow). 

We like to do things that we see proven out first.  We may question does faith work?  Our example of a righteous man walking in integrity and proving faith works is Noah, Abraham, Paul, and the apostles.  God gave us the bible filled with examples of what Godly beliefs can do for our lives.  Then we can be the righteous man and the example to our children.