Hegel makes use of this phrase in the “Lordship and Bondage” chapter of the Phenomenology in a way that I found very interesting, in that it is not at all in the Solomonic parlance. The “fear” here is not reverence or humility, but the absolute fear that confronts a consciousness in the figure of the master, a fear that forces it to “melt to its inmost soul.” Without this labor of the negative, consciousness can never be truly “for itself.” Likewise, the lord mentioned here is not a deity figure, but the other of the master. And lastly, the beginning of wisdom is not the practical moral knowledge of the proverbs, but the only sense in which a consciousness can attain the knowledge that it exists objectively, in and for itself (an und fur sich). This phrase is actually quite a nice summary of the maser/slave dialectic as a whole. Pithy.