Today we use the word faith to mean many things, we can have faith that the pilot of an airplane has the knowledge and skill to fly safely. Abraham is described this way in Genesis 15:6, “And he believed in the Lord; and he counted it to him for righteousness.” The word believe is Strong’s #h539 — pronounced [aweman] and it means to confirm or support. Possibly it is where we get the English word amen used at the end of a prayer.