Some signs of a believer

Imam As-Sadiq (a.s.) said:
اَلْمُؤْمِنُ حَسَنُ الْمَعُونَةِ خَفِيفُ الْمَؤُنَةِ، جَيِّدُ التَّدْبِيرِ لِمَعِيْشَتِهِ لا يَلْسَعُ مِنْ جُحْر مَرَّتَيْنِ

Translation
A believer provides valuable assistance, has low expenditure, and is prudent in life, and is never bitten twice from one hole (never inflicted twice from one source). 1

Brief Description
Belief has some scientific, moral and social manifestation and signs, without which it is only a meaningless name. The above tradition refers to four signs of it:
1- Believers provide valuable assistance to their Muslim brothers because their help is accompanied with compassion, honesty and awareness.
2- They do not have a luxurious and costly standard of living and do not commit offenses to provide for it.
3- They are prudent and aware in life especially in economic affairs.
4- They take lesson from each event immediately and thus they are not inflicted twice from the same source.[divider]
•    1. Safinat’ul-Bihar, Alkafi, vol 2, page 241, Wasa’il Alshia, vol 15, page 193.