Success is counted sweetest

Question

By those who ne'er succeed.
To comprehend a nectar
Requires sorest need.
Not one of all the purple host
Who took the flag to-day
Can tell the definition.
So clear, of victory.
As he, defeated. dying.
On whose forbidden ear
The distant strains of triumph
Which inference is supported by the poem?
1. To achieve success, one must experience success.
2. To value success, one must understand failure.
3. Success and failure are really the same thing.
4. Only after repeated failure may success be achieved.

Answer 1

2. To value success, one must understand failure.