It is reported that Maymūn b. Mihrān – Allāh have mercy on him – said:

I have met men in front of whom I would be ashamed to speak, and I have met men who used to say nothing but the truth, or be silent. And I have met men who had never seen the sky properly, out of fear of their Lord.

Abū Bakr Al-Daynūrī, Al-Mujālasah wa Jawāhir Al-ʿIlm article 2039.