Time takes it all, whether you want it to or not. Time takes it all, time bears it away, and in the end there is only darkness. Sometimes we find others in that darkness, and sometimes we lose them there again.
To us, the moment 8:17 A.M. means something - something very important, if it happens to be the starting time of our daily train. To our ancestors, such an odd eccentric instant was without significance - did not even exist. In inventing the locomotive, Watt and Stevenson were part inventors of time.
If you go flying back through time, and you see somebody else flying forward into the future, it's probably best to avoid eye contact.
The only way to maintain a moderate sum of happiness in this life, is not to worry about the future or regret the past too much.
Now he has departed from this strange world a little ahead of me. That means nothing. People like us, who believe in physics, know that the distinction between past, present, and future is only a stubbornly persistent illusion.