Charles! my slow heart was only sad, when first
I scanned that face of feeble infancy;
For dimly on my thoughtful spirit burst
All I had been, and all my babe might be!
But when I saw it on its Mother's arm,
And hanging at her bosom (she the while
Bent o'er its features with a tearful smile),
Then I was thrilled and melted, and most warm
Impressed a Father's kiss: and all beguiled
Of dark remembrance, and presageful fear,
I seemed to see an Angel's form appear--
'Twas even thine, beloved Woman mild!
So for the Mother's sake the Child was dear,
And dearer was the Mother for the Child.

Samuel Taylor Coleridge

http://www.poemhunter.com/poem/sonnet-xix-to-a-friend-who-asked-how-i-felt-when-the-nurse-first-presented-my-infant-to-me/