Nothing in the entire universe ever perishes, believe me, but things vary, and adopt a new form. The phrase being born is used for beginning to be something different from what one was before, while dying means ceasing to be the same. Though this thing may pass into that, and that into this, yet the sums of things remains unchanged.
Take this at least, this last advice, my son:
Keep a stiff rein, and move but gently on:
The coursers of themselves will run too fast,
Your art must be to moderate their haste.
In your judgment virtue requires no reward, and is to be sought for itself, unaccompanied by external benefits.
[Lat., Judice te mercede caret, per seque petenda est
Externis virtus incomitata bonis.]
Tempore difficiles veniunt ad aratra juvenci;
Tempore lenta pati frena docentur equi.
In time the unmanageable young oxen come to the plough; in time the horses are taught to endure the restraining bit.