Perplex

Sometimes, it seems to me,
I can be
Master, faster, clearer, brother,
Longer, stronger, purer, lover,
Than any on earth.
This I call confidence,
The other despair

Sometimes, it seems to me,
I must be
Lower, slower, coarser, dimmer
Sneaker, weaker, liar, sinner,
Than any on earth.
This I call humbling,
The other sheer pride.

How can I
Meekly inherit earth,
Not overestimate my worth?
Not knowing,
I keep going.