What can keep God's blessings from us?

Matthew Henry in his  Bible Commentary says

" God has blessings ready for us but we have  not room to receive them due to

   1.  weakness of our faith
    2.  narrowness of our desires"


 This was from Malachi 3:7-12.
You can google and  read his complete book online for free. 

I use Matthew Henry's Concise version, and have  a hard copy of it. My wonderful son in law pointed it out to me at a church library give away event!
  I had frugally  been collecting his Complete Version volume by volume as I came across them at used bookstores. 
 But  to acquire his  complete commentary on the whole Bible,  concise version,  for free!  Now that was a happy and frugal day!