In the Old Testament the New lies hidden; in the New Testament the Old is laid open.
Augustine of Hippo
Oh, give thanks to the LORD! Call upon His name; Make known His deeds among the peoples! Sing to Him, sing psalms to Him; Talk of all His wondrous works! Glory in His holy name; Let the hearts of those rejoice who seek the LORD!
1 Chronicles 16:8-10
The New King James Version
Christianity can be condensed into four words: admit, submit, commit and transmit.