Modesty and holding back what you say is a sign of Iman

from the Prophet ﷺ ˹who˺ said: Modesty and hesitation ˹in speech˺ are two branches of Iman, ˹while˺ crudeness and ˹bluntness˺ (or excessive speech) are two branches of hypocrisy.  

عَنِ النَّبِيِّ ﷺ قَالَ الْحَيَاءُ وَالْعِيُّ شُعْبَتَانِ مِنَ الإِيمَانِ وَالْبَذَاءُ وَالْبَيَانُ شُعْبَتَانِ مِنَ النِّفَاقِ