What great thing would you attempt if you knew you could not fail?

What would you attempt to do if you knew you would not fail?

I'd rather attempt to do something great and fail than to attempt to do nothing and succeed.

I had rather attempt something great and fail, than to attempt nothing at all and succeed

If you listen to your fears, you will die never knowing what a great person you might have been.

The Crystal Cathedral is not an attempt to be an architectural ego-statement. It's probably the ultimate spiritual and psychological statement that could be made in architectural terms.