This book of the law shall not depart from your mouth, but you shall meditate on it day and night, so that you may be careful to do according to all that is written in it; for then you will make your way prosperous, and then you will have success. -- Joshua 1:8 NASB So will My word be which goes forth from My mouth; It will not return to Me empty, Without accomplishing what I desire, And without succeeding in the matter for which I sent it. -- Isaiah 55:11 NASB Heaven and earth will pass away, but My words will not pass away. -- Mark 13:31 NASB