One of these days is yesterday. With its' mistakes and cares, its faults and blunders, its aches and pains , yesterday has passed forever beyond our control. All the money in the world cannot bring back yesterday. We cannot undo a single act we perfomed. We cannot erase a single word we said.
Yesterday is gone forever.
The other day we should not worry about is tommorow. With its possible adversities, its burdens, its larger promise, tommorow is also beyond our immediate control. Until it does, we have no stake in tommorow, for it is yet unborn. This leaves only one day, today . Any man can fight the battles of just one day.