"Therefore do not worry about tomorrow,
for tomorrow will worry about itself.
Each day has enough trouble of its own."
Oh, ask not thou, how shall I bear
The burden of tomorrow?
Sufficient for today, its care,
Its evil and its sorrow;
God imparteth by the way
Strength sufficient for the day.
~J. E. Saxby
"He that hath so many causes of joy, and so great, is very much in love with sorrow and peevishness, who loses all these pleasures, and chooses to sit down upon his little handful of thorns. Enjoy the blessings of this day, if God sends them; and the evils of it bear patiently and sweetly; for this day only is ours; we are dead to yesterday, and we are not yet born to the morrow. But if we look abroad, and bring into one day's thoughts the evil of many, certain and uncertain, what will be and what will never be, our load will be as intolerable as it is unreasonable." ~Jeremy Taylor
taken from Daily Strength for Daily Needs by Mary W. Tileston, 1891