Imam Sadiq (a.s) quoted on the authority of God's Prophet (a.s)
“Whoever does not recognize his own level of abilities will be ruined. Anyone who thinks he is better than he really is has a mental defect.”
عن أبي عبد الله (عليه السلام) قال
قال رسول الله (صلى الله عليه وآله): ما هلك امرؤ عرف قدر نفسه، ثم قال أبو عبد الله (عليه السلام): وما أخال رجلا يرفع نفسه فوق قدرها إلا من خلل في عقله.
Similar narrations
Mishkāt al-Anwār #669“Whoever recognizes his destiny will not get ruined, and the people will not cry over what they lose, but over what they excessively...