Here JESUS is walking out of a town having just raised a girl from the dead, and two blind men having heard of His greatness, follow Him begging for JESUS to have mercy and heal them as well.  At this JESUS asks them a simple question;

Their response was two words, but it is in these two words that they show the measure of their faith.

What's so important?  I know that He is LORD,  so why is it such a big deal that these two call Him LORD?  I want to point out that JESUS' ministry had only just started and it was only by word of mouth that these blind men had heard about JESUS and the stuff He was doing.

Here is where we get to JESUS' response, He doesn't say; "let it be so", which He had the power to do and send them away.  No, instead He said it was by their faith it would be so, so if they really didn't believe He was LORD and had the power to heal them they wouldn't have been delivered from the oppression and the bondage of not having any sight.  

It is also by the measure of our faith that we receive our healing, gifts, blessings, and so much more from GOD.  In your time of need hear JESUS say to you;  "Do you believe that I am able to do this?"  Well, according to your faith (in Him) will it be done to you.

LORD, increase my faith