Several core concepts found in the ancient Hebrew tradition that are often cited as the most important concepts explored by existentialism, for example, the "uneasiness" "deep within Biblical man," also his "sinfulness" and "feebleness and finiteness."
In the words of Barret, "right conduct is the ultimate concern of the Hebrew,"[REF] and indeed for the observant Jew, according to R. Soloveitchik.