Rabbi quoted in the Sayings of the Fathers (Pirke Avos)
Every Yom Kippur an old man dressed in white and wrapped in white meets me and goes in with me [to the Kodesh haKedoshim (the Holy of Holies)] and comes out with me. This year an old man dressed in black and wrapped in black met me and went in with me but did not come out with me.
The world stands on three things, on Torah [study], on the service [of HaShem], and on bestowing kindnesses.
For his entire life he was in the company of wise men and Of all the things beneficial to one’s body, silence is the best. [paraphrase]