See for Yourself
When the Wright brothers first began experimenting with flying machines, they accepted as fact the data and conclusions that were available in the theory of aviation. As they experimented, however, their own experience provided different conclusions. They began by doubting nothing, yet grew to disbelieve everything about accepted aviation theory. Finally, disregarding all they had learned, they relearned through personal investigation. This led them to build man-carrying gliders in which they spent hundreds of hours over Kill Devil Hills, North Carolina. In their Dayton bike shop they built a custom wind tunnel and tested over two hundred different wing surfaces. With minor refinements, their wind tunnel became the prototype of the one used today, and the control system they devised is still used on fixed-wing aircraft.
So many people accept the word of another for the reality of Christ, or for a teaching that is supposed to be in the Bible. In reality, they base their faith on the faith of another—which might be real and true; but again, it might not. The only way to know that you are seeing Jesus personally, Jesus really, and Jesus alone, is to have a personally investigated faith. Study his word—let God speak for himself. We must see Jesus for ourselves.
Source: [Hurley, V. (2000, c1995). Speaker’s sourcebook of new illustrations (electronic ed.) (52). Dallas: Word Publishers.] From a sermon by David Scudder, "Meeting the Exalted Christ Part II" 8/4/2008.