Because
Acts 4:16
Saying, What shall we do to these men? for that indeed a notable miracle hath been done by them is manifest to all them that dwell in Jerusalem; and we cannot deny it.
Acts 17:30
And the times of this ignorance God winked at; but now commandeth all men every where to repent:
Acts 17:31
Because he hath appointed a day, in the which he will judge the world in righteousness by that man whom he hath ordained; whereof he hath given assurance unto all men, in that he hath raised him from the dead.
Romans 10:14-17
14
How then shall they call on him in whom they have not believed? and how shall they believe in him of whom they have not heard? and how shall they hear without a preacher?
15
And how shall they preach, except they be sent? as it is written, How beautiful are the feet of them that preach the gospel of peace, and bring glad tidings of good things!
16
But they have not all obeyed the gospel. For Esaias saith, Lord, who hath believed our report?
17
So then faith cometh by hearing, and hearing by the word of God.
Romans 16:25
Now to him that is of power to stablish you according to my gospel, and the preaching of Jesus Christ, according to the revelation of the mystery, which was kept secret since the world began,
Ephesians 2:11
Wherefore remember, that ye being in time past Gentiles in the flesh, who are called Uncircumcision by that which is called the Circumcision in the flesh made by hands;
Ephesians 2:12
That at that time ye were without Christ, being aliens from the commonwealth of Israel, and strangers from the covenants of promise, having no hope, and without God in the world:
Ephesians 3:5
Which in other ages was not made known unto the sons of men, as it is now revealed unto his holy apostles and prophets by the Spirit;
Ephesians 3:6
That the Gentiles should be fellowheirs, and of the same body, and partakers of his promise in Christ by the gospel:
Colossians 1:26
Even the mystery which hath been hid from ages and from generations, but now is made manifest to his saints:
Go
Matthew 22:9
Go ye therefore into the highways, and as many as ye shall find, bid to the marriage.
Matthew 22:10
So those servants went out into the highways, and gathered together all as many as they found, both bad and good: and the wedding was furnished with guests.
Ecclesiastes 9:10
Whatsoever thy hand findeth to do, do it with thy might; for there is no work, nor device, nor knowledge, nor wisdom, in the grave, whither thou goest.
Luke 14:21-23
21
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.
22
And the servant said, Lord, it is done as thou hast commanded, and yet there is room.
23
And the lord said unto the servant, Go out into the highways and hedges, and compel them to come in, that my house may be filled.
John 9:4
I must work the works of him that sent me, while it is day: the night cometh, when no man can work.
and
Ephesians 6:8
Knowing that whatsoever good thing any man doeth, the same shall he receive of the Lord, whether he be bond or free.
Hebrews 6:10
For God is not unrighteous to forget your work and labour of love, which ye have shewed toward his name, in that ye have ministered to the saints, and do minister.