Nor can we erase a single word we've said - yesterday is gone. Tomorrow is beyond our control. Your Browser cannot read Java. And until it does, we have no stake in tomorrow, for it is yet unborn. This leaves only one day - today.
Any person can fight the battles of just one day.
It is only when we add the burdens of yesterday and tomorrow that we break down. It is not the experience of today that drives people mad - it is the remorse of bitterness for something that happened yesterday, and the dread of what tomorrow may bring.