Musar su Salmi 45:1

The "seven pillars that she has hewn" refers to seven categories of righteous people (Sifri Devarim 1,10). These groups occupy different levels in גן עדן, one above the other. Rabbi Shimon ben Yochai comments on Psalms 16:11: שבע שמחות, "full of joys," [i.e. satisfied, from Sova] that the word should be read as שבע, "seven." It would then refer to the seven facets of the various righteous people who would be similar to the moon, the sun, the firmament, the stars, lightning, שושנים, [a reference to the righteous as per Psalms 45,1, see my translation of the Alshich's commentary page 315. Ed.], and the candlestick in the Temple.