آفة العقل الهوى
uncontrolled emotions are the blight of the mind
This quote is one of the early definitions of emotional intelligence. Have a look at the modern definition.
لاتَجْتَمِعُ الْبِطْنَةُ وَ الفِطْنَةُ
Overeating and mental sharpness do not get along.
كن بعدوك العاقل أوثق منك بصديقك الجاهل
Have more trust in a rational enemy than in a stupid friend.
A sane person doesn’t trust his enemies and is cautious when dealing with them. The Imam says that we have to be even more cautious with our friends if they are stupid. This is because a stupid friend may reveal your secrets, embarrass you, or get you into trouble.
العقل ثوب جديد لا يبلى
The mind is a new dress that never wears out.