Abraham responded and said: Behold, now, I wanted to speak to my Lord, although I am but “afar va’efer” – dust and ashes. (Genesis 18:27)
The gemmatria (numerical value) of the Hebrew letters ‘afar va’efer’ (631) is the same as the value of the word KA’TORAH (as the Torah).
The Torah only becomes accessible to those who humble themselves to her. (Chasam Sofer)