faith and promise

he staggered not at the promise of God through unbelief Romans 4:20

A promise is an assurance given by one person to another that he will or will not do a certain thing. the validity of the promise depends[ends on the character and resources of the one who makes it, even as the value of a bank-note depends on the reputation and resources of the bank on which it is drawn.
A promise of God in His Word is an undertaking given by God. His character is there fore involved in His promises...Faith is the power which grabs God's promise based on His sure character. Faith is the power which turns promise into preformance. Our faith is full persuaded that what God has promised, He is able to perform. Romans 4:12.

j.o. sanders