Read Proverbs 18:12

Humility is not how you dress, it is not the money you make, it is not where you live, it's not what you drive, it is not even how you look. We're never once commanded by God to "look" humble. 

Humility is an attitude. It is an attitude of the heart. An attitude of the mind. It is knowing your proper place. Never talking down or looking down because someone may be of a financial level less than yours. It is knowing your role and fulfilling it for God's glory and praise. 

I repeat, it is an attitude....

The attitude Christ had, who emptied Himself of the voluntary and independent use of His divine attributes. There is no quality more godlike than humility....

The place of highest exaltation, as we see in the Lord Jesus Christ, is a place of self-emptying humility. It's not a phoney-baloney style of fake piety. It's true humility of mind. It's putting the other person first.... 

It is being like Christ.

Excerpted from Charles R. Swindoll, Wisdom for the Way (Nashville: J. Countryman, a division of Thomas Nelson, Inc., 2001). Copyright © 2001 by Charles R. Swindoll, Inc. All rights reserved. Used by permission.