That the communication of thy faith may become effectual by the acknowledging of every good thing which is in you in Christ Jesus. Philemon 1:6
"The Christian's faith in something that cannot be seen is a source of 
wonder to the unbeliever, and is often the object of ridicule and contempt.
The worldling regards the simple faith of the Christian as an evidence of weakness of mind, and with a complacent smile at the thought of the superiority of his own intellect, he declares that he never believes a thing without evidence; he never jumps at conclusions, and doesn't believe anything that he cannot see and understand.
The saying that the man who believes nothing that he cannot understand will have a very short creed, is as true as it is trite." E.J. Waggoner
