God swore.

God made two promises.(In Hebrews 6)
In order to make it more trustworthy and official-sounding he sealed his promises with an oath. He swore not "on a stack of Bibles" nor on "his mother's grave" as we have heard people do, HE SWORE ON HIMSELF...Hebrews 6.
God cared so much that we would believe His Word that he came down to our verbal level and SWORE that he would keep his Word.

People let us down...all the time. They say one thing and do another. Businesses let us down. We have become a society suffering from mistrust.
I recently heard a friend telling of her home country where they have had to resort to hiring armed guards to patrol her fenced (gated) community to keep them safe. She chooses not to live there. Those that live within the fence have imprisoned themselves for safety. People cannot be trusted.

God has promised to bless us as his children and to multiply our lives. He swore he would. How much more proof do we need? He cannot lie. God will bless and multiply your life.