How poetry progresses with age

Sher arz hai:

Jab zoaf barha to khush-bayani aayi,
Tab bahr-e-tabiyat mein rawani aayi,
Jitni barhti gayi peeri Ghalib,
Utni mere sheron pe jawani aayi.

( As by body becomes older and weaker, I notice that my speech and writing is becoming more cheerful,
And the sea of my nature is now flowing so freely,
And as I become detached, and gain in spirituality O Ghalib,
My poems are becoming equally younger and more sensuous)