Measuring the depth..

Otften I been told and done this.
To know about a particular thing, one needs to experience it. It's like saying, the depth of the ocean cannot be measured if you are not willing to get your feet wet.

I have to live by this philosophy and the most recent example was the skydiving experience.
Wonder if all do the same? Or are just content by believing what others say or seeing what others have done.