"Let Moshiach Come But Let Me Not See Him" - Why?

Ollie talks to Rabbi Manis Friedman about a line in the Talmud that says "Let the Messiah come but let me not see him" (Sanhedrin 98b). What does this mean? What were the Rabbis referring to? This video is dedicated in honour of Rabbi Sacks zt”l, Rabbi David Geffen zt”l and Dr Len Shulman z”l (who never got jealous or angry, but who just endured in lovingkindness until the lesson was learned.)’