A mother's endearment

In the vast realm of this wretched misery There lives a prowess, with an ardent melody; She emanates the beacon of her loving light She is my bastion, in times of blight; Her adoring caresses parries my solitude For her inextensible grace, I couldn't repay my gratitude; Her wise adorned with limitless dexterity For none could ameliorate her mind's sagacity; Her unwavering support, instigated with love stands at the zenith, on the pinnacle above.