One of these days is Yesterday. Yesterday, with its cares and frets and pains and aches, all its faults, its mistakes and blunders, has passed forever beyond my recall. The other day that I do not worry about is Tomorrow. Tomorrow, with all its possible adversities, its burdens, its perils, its large promise and performance, its failures and mistakes, is as far beyond my mastery as its dead sister, Yesterday. There is left, then, for myself but one day in the week - Today.
Any man can fight the battles of today.
It isn't the experience of Today that drives men mad. It is the remorse of what happened Yesterday and fear of what Tomorrow might bring. Leave them to Him.