There are a some lessons that we all learn the hard way. Trial and error, though equally arduous, are still the two most ingraining teachers any of us will ever have. We often learn more from our failures than our successes. But like Newton tells us, at times we move forward only by hefting ourselves onto the shoulders of giants.
More than anything, I wish I would have learned a few things sooner. There are so many lessons that would have benefitted me if I had only understood... more