Answer: show strength when facing obstacles.
Step-by-step explanation:
Hercules as a baby was strong enough to strangle two snakes when they came to kill him. This shows him overcoming an obstacle with strength at such a tender age.
It therefore stands to reason that as he grows up, he will only get stronger and thus be able to show even more strength in any obstacle facing him and from what we know of Hercules, he did just that.