Even chance meetings are the result of karma… Things in life are fated by our previous lives. That even in the smallest events there’s no such thing as coincidence.
People die all the time. Life is a lot more fragile than we think. So you should treat others in a way that leaves no regrets. Fairly, and if possible, sincerely. It's too easy not to make the effort, then weep and wring your hands after the person dies.
I went to the woods because I wished to live deliberately, to front only the essential facts of life, and see if I could not learn what it had to teach, and not, when I came to die, discover that I had not lived.
Life should not be a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside in a cloud of smoke, thoroughly used up, totally worn out, and loudly proclaiming "Wow! What a Ride!