Faith In An Invisible God

Our trust to follow an unseen God is often poo-pooed by unbelievers. They argue that the only thing real is that which you can see, touch or hold in your hands. To follow an invisible God who supposedly wrote a book of rules several thousand years old is ridiculous. Faith is something you put aside along with the religion it represents.
   
Ouestion, dear unbeliever: Are you sure the chair will hold you, yet you go ahead and in faith and sit in it. You don't know if the hamburger at the fast-food restaurant is safe to eat but you go ahead and eat two of them. Do you know whether the medicine the doctor prescribed is safe and being correctly filled? And yet you swallow them down. Is the pilot who flies your plane going to have a heart attack and yet you get on with no questions asked. Isn't that faith?
   
Hebrews 11:8 says an invisible God spoke to Abraham to go to a place and "he obeyed and went". Abraham then was promised by this invisible God to have a child by a barren woman who was too old to bear children, "Yet with respect to the promise of God, he did not waver in unbelief but grew strong in faith, giving glory to God." (Rom. 4:20) AND IT WORKED!