Bertrand Russell said this quote

And always, in our highly regularised way of life, he is obsessed by thoughts of themorrow. Of all the precepts in the Gospels the one that Christians have most neglected is the commandment to take no thought for the morrow. If a man is prudent, thought for the morrow will lead him to save; if he is imprudent, it will make him apprehensive of being unable to pay his debts. In either case the moment loses its savour. Everything is organised, nothing is spontaneous.