Israel Abrahams, 1911 Encyclopædia Britannica, Volume 17… (1911)
“ Never would he retire to rest until he had fulfilled his definite engagements to those who had served him. Luria and his school altered the very look of the Jewish Prayer Book. Prayer was his main prop. By it men became controllers of the earthly world and reached God. He or his school introduced innumerable ritual customs, some of them beautiful enough. On Sabbath he dressed in white, wearing a four-fold garment to typify the four letters of the Divine Name. The Sabbath was to him an actual cult. ”
