Proverbs 25:14 Like clouds and wind without rain is one who boasts of gifts never given.
How many times have you said you were going to do something but never actually got around to doing them?
One thing Christ made sure of was the fact He would always follow through on what He said and always live up to His promises made; to the extent we can believe everything He ever said as a promise!
Being honest is one thing, but making sure your honesty is upheld is often a lot harder to do. Live up to what God is asking you to do so He can get the glory!