An verse from Bhaja govindam.

Angam galitam palitam mundam,
Dasana vihinam jatam tundam,
Vriddho yati grihatva dandam,
Tadapi na muncatyasa -pindam!

Bhaja govindam, bhaja govindam,
Bhaja Govindam mudhamate!

Meaning:

Feeble has grown the old man's body,
Toothless his gums  and bald his head,
But there he goes, upon his crutches ,
Clinging firmly to fruitless hope!

Worship Govinda, worship Govinda,
Worship Govinda,foolish one!

This verse the observation  and advise of Adi Shankara' is  from his famous 'Bhaja Govindam' song written nearly 1300 years earlier, in the prime of his youth.