And Abraham answered and said, Behold now, I have taken upon me to speak unto the Lord, which am but dust and ashes- Genesis 18:27

I have seen some people very proudly humble, very boastful of their humility. They have been so humble that they were proud enough to doubt God. They could not accept the mercy of Christ, they said; they were so humble. In truth, theirs was a devilish humility, not the humility that comes from the Spirit of God. Oh, no! This humility makes us walk with God; and, beloved, can you conceive a higher and truer humility than that which must come of walking with God? Remember what Job said, “I have heard of thee by the hearing of the ear: but now mine eye seeth thee. Wherefore I abhor myself, and repent in dust and ashes.” Remember how Abraham, when he communed with God, and pleaded with Him for Sodom, said, “I have taken upon me to speak unto the Lord, which am but dust and ashes;” “dust”-that set forth the frailty of his nature, “ashes”-as if he was like the refuse of the altar, which could not be burnt up, which God would not have. He felt himself to be, by sin, like the sweeping of a furnace, the ashes, refuse of no value whatsoever; and that was not because he was away from God, but because he was near to God. You can get to be as big as you like if you get away from God; but coming near to the Lord you rightly sing,-

“The more Thy glories strike mine eyes,
The humbler I shall lie.”

Depend upon it that it is so. It might be a kind of weather-gauge as to your communion, whether you are proud or humble. If you are going up, God is going down in your esteem. “He must increase,” said John the Baptist of the Lord Jesus; “but I must decrease.” ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/2328.cfm