Our Salaf: Muhammad Ibn Ali Ibn Husain–The Blocks of Iron and the torn rag!
Muhammad Ibn Ali (rahimahullaah) said:
”Eemaan is (to be) firmly established in the heart and certainty is of very great importance; so when certainty flows in the heart, it becomes like blocks of iron; but if it exits from it, it becomes like a torn rag.”
He (rahimahullaah) said:
”Pride does not enter the heart of a person, except that he is diminished in intellect in accordance with what enters of that—whether little or plentiful.”
[Source: Seeratus Salaf As-Saaleh by: Imaam Ismaaeel Bin Muhammad Bin Fadl Al-Asbahaanee (535AH: Chapter: A mention of those who followed the companions in righteousness