It's easy to say "choose so that you'll have no regrets," but that's impossible. No matter how hard you've agonized over your path, you'll always regret something about it later. That's just how we humans are made. Which is why I think our true feelings are important. If you choose your path based on your true feelings, it'll hurt just a little less when you feel the same regret, right?
If at some point in life, you made a mistake or keep failing over and over again, and you can't help but think it's useless and you're a good for nothing; Remember, you're only taking a detour. And I'm sure further along your path will come a day where you think, "It was a good life experience". That's why it'll be fine.
Even if you have regrets, even if you have remorse, you must fight. If you have made the decision for yourself to fight, to struggle, then fight with all you have. Do not give up for one second, one moment, or one instant. Cling greedily to the victory you have within your sight. If you can still stand, if your fingers still move, if all your teeth have not broken, stand and fight. You must fight!
If we only focus on making the best moves, we will never get the better of our opponent. When necessary, we must be willing to take big risks, and be prepared to lose everything. Unless we change how we fight, we cannot win.
If you begin to regret, you'll dull your future decisions and let others make your choices for you. All that's left for you then is to die. Nobody can foretell the outcome. Each decision you make holds meaning only by affecting your next decision.
You just went for my head, didn't you? You know you could kill someone by hitting a vital spot in their head, right? If you know this, then you were trying to kill me, right? So whatever I do next is what you deserve, right?
"Are you prepared to die?". Most astronauts answer with a simple "yes", but you can say anything. It's just a weak yes. You shouldn't be prepared to die. Instead, you should have the resolve to live until the very end! If there's someone who replies "no", you can trust them.
Everyone has to die someday. But what they believed in will never fade away as long as someone protects it. Once you've resolved to take on those principles, no matter how much blood and tears you shed, you follow through with it! That's what it means to be a knight.