In Time

We need be careful how we deal with those about us, when every death carries to some small circle of survivors, thoughts of so much omitted, so little done -- of so many things forgotten, and so many more which might have been repaired! There is no remorse so deep, as that which is unavailing; if we would be spared its tortures, let us remember this, in time.

Charles Dickens, Oliver Twist, chap. 33