Mr. Wesley was once engaged in a discussion on the subject of faith. No one was able to furnish a definition satisfactory to him or to any one present.
In the midst of their perplexity, Mr. Wesley said, "Let us call on Mrs. ---------" naming an individual of good sense & of very deep piety.
"She," continued Mr. Wesley, "can tell us just what faith is, because she has consciously exercised it."
When asked to tell what faith is, her reply was this, "It is taking God at His Word."
"That will do," exclaimed Mr. Wesley. "And that will do for us all."
“True faith rests upon the character of God and asks no further proof than the moral perfections of the One who cannot lie. It is enough that God has said it.” - A W Tozer.
Heb 11:1 (WEB) "Now faith is assurance of things hoped for, proof of things not seen."