knowing when you're humble? [a quote for thought]

I read this some time ago, and it has really stuck with me.
I have often heard people say that if you are thinking you
are humble then you are probably not.  I have also thought
this.  This quote helped me to reconsider this from the Bible.

"Often I have read that if you think that you’re humble, you’re

not. But that is neither helpful nor correct. It’s not helpful, because

how am I supposed to get it if I can’t know when I have it? There

are many verses that exhort us to be humble (Phil. 2:3; Col. 3:12; 1

Pet. 5:5). It would be very puzzling to attempt to become what we

can’t know if we’ve got it! And, it’s not correct because Paul had

told the Ephesian elders that he had served the Lord in Ephesus

with all humility (Acts 20:19). So, apparently Paul knew that he had

it and he didn’t lose it by saying so!  Briefly note two things.

First, humility means being Christ-sufficient, not self-sufficient. 

The proud person trusts in himself.

He thinks that he can do it. You often hear, “You’ve got to believe

in yourself.” No, the humble Christian trusts in Jesus. He knows

that if he believes in himself, he will fail big-time!

Second, humility does not mean dumping on yourself. Rather,

the humble person recognizes that God has graciously given him

certain abilities that he is to use for God’s glory and purposes. So,

with Paul we can say, 'Not that we are adequate in ourselves to

consider anything as coming from ourselves, but our adequacy is

from God' (2 Cor. 3:5; see, also, Rom. 12:3)."

from Steven Cole, on Ephesians 4:1-3

Here are the verses [ESV] for your convenience:

Ephesians 4:1-3  I therefore, a prisoner for the Lord,
urge you to walk in a manner worthy of the calling to 
which you have been called, with all humility and gentleness,
with patience, bearing with one another in love, eager to 
maintain the unity of the Spirit in the bond of peace.

Philippians 2:3  Do nothing from rivalry or conceit, but 
in humility count others more significant than yourselves.

Colossians 3:12  Put on then, as God's chosen ones, holy
and beloved, compassionate hearts, kindness, humility, meekness,
and patience...

1 Peter 5:5  Likewise, you who are younger, be subject to 
the elders.  Clothe yourselves, all of you, with humility 
toward one another, for "God opposes the proud but gives
grace to the humble."

Acts 20:18-19  And when they came to him, he (Paul) said
to them: "You yourselves know how I lived among you the 
whole time from the first day that I set foot in Asia, 
serving the Lord with all humility and with tears and with
trials that happened to me through the plots of the Jews..."

Romans 12:3  For by the grace given to me I say to everyone
among you not to think of himself more highly than he ought to
think, but to think with sober judgement, each according to the
measure of faith that God has assigned...