Live for today; You are not promised a tomorrow

Moliere quote "Men spend most of their lives worrying about things that never happen."

Matthew 6:
30 "Now if God so clothes the grass of the field, which today is, and tomorrow is thrown into the oven, will He not much more clothe you, O you of little faith?
31 "Therefore do not worry, saying, 'What shall we eat?' or 'What shall we drink?' or 'What shall we wear?'
32 "For after all these things the Gentiles seek. For your heavenly Father knows that you need all these things.
33 "But seek first the kingdom of God and His righteousness, and all these things shall be added to you.
34 "Therefore do not worry about tomorrow, for tomorrow will worry about its own things. Sufficient for the day is its own trouble.

James 4:
13 Come now, you who say, "Today or tomorrow we will go to such and such a city, spend a year there, buy and sell, and make a profit";
14 whereas you do not know what will happen tomorrow. For what is your life? It is even a vapor that appears for a little time and then vanishes away.
15 Instead you ought to say, "If the Lord wills, we shall live and do this or that."