Here Jesus says you cannot add any time to your life by worrying. If you think about it, it actually does the complete opposite! The time you spend worrying you could use to do something that will matter in the future. If you think about it, it doesn’t matter how much you worry, it’s not going to change anything! The results are going to be the same anyways so why waste your time worrying?
Here Jesus says to first seek Gods kingdom and Gods will, if you worry it can distract you from what God has put in front of you. And if you seek Gods will, even above your own everything will fall into place. So instead of worrying pray! Tell God your worrys and trust him with them! He knows what the future holds so just trust him! Another great thing to do when you start to worry is to read your bible! The whole bible is literally a book of what God says, and how to live his way!