The Tears of a Child
18:1 וירא אליו ה׳ [And G-d revealed Himself to him [Abraham]...]
When Rabbi Sholom DovBer of Lubavitch was a child of four or five, he entered the room of his grandfather, Rabbi Menachem Mendel, and burst into tears. His teacher in cheder had taught the verse “And G-d revealed himself to Abraham...” “Why,” wept the child, “does not G-d show Himself to me?!”
Rabbi Menachem Mendel replied: “When a Jew, a tzaddik,1 realizes at the age of 99 that he must circumcise himself, that he must continue to perfect himself, he is worthy that G-d should reveal Himself to him.”
Source: Hayom Yom [calendar with quotations from Rabbi Yosef Yitzchok of Lubavitch, compiled in 1943 by Rabbi Menachem M. Schneersohn, the Lubavitcher Rebbe shlita], quotation for Cheshvan 9th.
1 A perfectly righteous individual.