“You can destroy your now by worrying about tomorrow.”
“Don't worry now about what you can't change. Rest when you can so you'll be ready for tomorrow's battles.”
“But Sam only grinned at her and said, “Now, don’t you worry about a thing. I promise—I’ll hold your hand tomorrow.”
“Do not worry about tomorrow, for tomorrow will worry about itself..”
“Never worry about tomorrow, Charlie Brown. Tomorrow will soon be today, and before you know it, today will be yesterday! I always worry about the day after tomorrow!”
“Tomorrow is another day. I've got plenty of things to worry about right now.”