Imam Reza (a):
مَنْ أَرَادَ أَنْ لَا یَشْتَكِیَ مَثَانَتَهُ فَلَا یَحْبِسِ الْبَوْلَ وَ لَوْ عَلَى ظَهْرِ دَابَّتِه؛
“Whoever wants to avoid complaints about their bladder should not hold their urine, even if they are riding on their mount.”
Ṭibb Al-Reza: 35
The Messenger of Allah (s):
تَجَنَّبِ الدَّوَاءَ مَا احْتَمَلَ بَدَنُكَ الدَّاءَ فَإِذَا لَمْ یَحْتَمِلِ الدَّاءَ فَالدَّوَاء؛
“Avoid medication as long as your body can tolerate the pain, but when it cannot, then use medication.”
Makarem Al-Akhlaq: 362
Amīr al-Muʾminīn (peace be upon him):
خالِطُوا النّاسَ مُخالَطَةً إنْ مِتُّمْ مَعَها بَکَوْا عَلَیکُم، وإنْ عِشْتُم حَنُّوا إلَیکُم.
“Treat people in such a way that if you die, they will weep for you, and if you live, they will yearn for you.”
Nahj al-Balāghah, Hikmah 10
Imam Hasan al-Askari (peace be upon him):
لا تُمارِ فَيَذْهَبُ بَهاؤُكَ، وَ لا تُمازِحْ فَيُجْتَرَأُ عَلَيْكَ.
“Do not argue with others, for it will diminish your dignity and respect. Do not joke with others, for it will embolden them to disrespect you.”
Aʿyān al-Shīʿa 2: 41