Our Lord says in His Word, "Let God be true, and every man a liar" (Romans 3:4a), for God is always true to His glory—always! (Though, sadly, we are not always faithful to God's glory or honoring of His character.) We also read in His Word that, "The heavens declare the glory of God" (Psalm 19:1a), and thus, by His own declaration, He must be faithful to the Truth He presents in this Psalm. The following video is a powerful testimony to that fact:
http://vimeo.com/36141149