Sonnet Liii:

LIII I am already entered on the way Too far to live beyond thy presence now. Once, like a bird upon a swinging bough, I might have sung my carol, sad or gay, Into thy heedless ear, and flown away; Leaving small cause to cloud thy placid brow, And one mere memory in my heart, to show The lingering twilight of a brighter day. But I am tamed to perch upon thy hand, To nestle in thy bosom, taste my food By thy lips sweetened, and to thy command My cultured voice is artfully subdued. I have forgot the wild ways of the wood; And live or die but as thy bounties stand.