[There's a very slight smile here]

Sure. Your life is yours to live -- just try to live it in a way that leaves you with as few regrets as possible. It'll never be zero, but just try to keep the number low.

[It's not like he can make Kurapika follow advice! All Kiryu can ask for is that Kurapika doesn't dismiss it, and seems Kurapika will at least keep it in mind instead of throwing it away as the nonsense of some old guy. Kiryu is satisfied!]