"In the last day, that great day of the feast, Jesus stood and cried, saying, If any man thirst, let him come unto Me, and drink." John 7:37
This is a plea from Jesus to give something to you that you cannot get unless you receive it by invitation. This plea was after the great celebration of the feast of tabernacles, eight days of celebration where food, wine was plentiful and a rather good time was had by all. At the end of the part, when everyone had been celebrating for eight days, Jesus offers something to drink for all those whose thirst was not quenched.
I. e., when you have run the gamut of trying to be filled with what the world offers and you have tried it out for quite a while, you will still be parched and thirsty for something more fulfilling and long lasting. Even if you filled up on this world's provisions, it would not be enough to satisfy your soul. Jesus offers what you cannot get by whipping out your credit card. If after you have partied down and filled yourself with this world's wares and you still feel like something is missing, Jesus offers you something to quench your thirst. Not only does what Jesus offer quench your thirst, it lasts and lasts.
You've been invited. What say ye?