Analysis of The Star Sirius

Bright Sirius! that when Orion pales
To dotlings under moonlight still art keen
With cheerful fervour of a warrior's mien
Who holds in his great heart the battle-scales:
Unquenched of flame though swift the flood assails,
Reducing many lustrous to the lean:
Be thou my star, and thou in me be seen
To show what source divine is, and prevails.
Long watches through, at one with godly night,
I mark thee planting joy in constant fire;
And thy quick beams, whose jets of life inspire
Life to the spirit, passion for the light,
Dark Earth since first she lost her lord from sight
Has viewed and felt them sweep her as a lyre.