A wedding is about to take place but before we consider the requirements for attending, Mark 4:12 KJV tells that eyes to see and ears to hear are needed to understand The Wedding Supper Parable:
That seeing they may see, and not perceive; and hearing they may hear, and not understand; lest at any time they should be converted, and their sins should be forgiven them.
Having been blinded by God and needing eyes to see, parables must be understood for us to be converted; Luke 14:16 KJV sheds light and brings life to The Wedding Supper Parable:
Then said he unto him, A certain man made a great supper, and bade many:
God is inviting us to this Wedding Supper (His Kingdom) and Christ (a certain man) has everything ready; Luke 14:17 KJV continues the invitation:
And sent his servant at supper time to say to them that were bidden, Come; for all things are now ready.
With Supper and the Groom ready, He asks: Who will hasten to answer the dinner bell that I am ringing? Luke 14:18-19 KJV responds:
And they all with one consent began to make excuse. The first said unto him, I have bought a piece of ground, and I must needs go and see it: I pray thee have me excused.  And another said, I have bought five yoke of oxen, and I go to prove them: I pray thee have me excused.
Consenting with excuses and with Christ calling us to His Wedding Supper, we continue making them. Is now the time to reconsider putting Him off?
There are also those failing to understand the wedding invitation that Christ extends to us; Luke 14:20 KJV shows them claiming to have already taken a wife:
And another said, I have married a wife, and therefore I cannot come.
Luke 14:21 KJV shows failing to understand, as well as excuses, being totally unacceptable:
So that servant came, and shewed his lord these things. Then the master of the house being angry said to his servant, Go out quickly into the streets and lanes of the city, and bring in hither the poor, and the maimed, and the halt, and the blind.
With time running short God digs hard to find all that want to attend His Wedding Supper.
Unable to gather enough guests, Luke 14:22-23 KJV shows God not leaving one stone unturned in His effort to fill His Wedding Supper Table:
And the servant said, Lord, it is done