The Prophet [SAW] used to seek refuge (with Allah) from four things: From knowledge that is of no benefit, from a heart that does not feel humble, from a supplication that is not heard, and a soul that is never satisfied.  

أَنَّ النَّبِيَّ ﷺ كَانَ يَتَعَوَّذُ مِنْ أَرْبَعٍ مِنْ عِلْمٍ لاَ يَنْفَعُ وَمِنْ قَلْبٍ لاَ يَخْشَعُ وَدُعَاءٍ لاَ يُسْمَعُ وَنَفْسٍ لاَ تَشْبَعُ