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.
Beneath the sun's rays our shadow is our comrade;
When clouds obscure the sun our shadow flees.
So Fortune's smiles the fickle crowd pursues,
But swift is gone whenever she veils her face.