“But the word is very nigh unto thee, in thy mouth, and in thy heart, that thou mayest do it.”
King James Version (KJV)
30:14 In thy mouth - Thou knowest it so well, that it is the matter of thy common discourse. In thy heart - In thy mind, (as the heart is very commonly taken) to understand and believe it. In a word, the Law is plain and easy: but the gospel is much more so.