"Everything in moderation"

Another version of the idea of keeping moderation in all areas of life is “nothing in excess”.  I am wondering if the saying is well-applied to length of life.  Living can be a pleasure and I have heard that once life is abandoned, it cannot be resumed.  So, it follows that one should be cautious about giving up on life.  My wife often said that she wanted a long life provided it was also a reasonably healthy one. I think it is possible to enforce a number of provisions and demands that life meet.