One way, not the only way The father calls mankind by the preaching of his word.
Notice who he is calling in this teaching:
Ac 2:21 And it shall come to pass, that whosoever shall call on the name of the Lord shall be saved.
Ac 10:43 To him give all the prophets witness, that through his name whosoever believeth in him shall receive remission of sins.
Ac 13:26 Men and brethren, children of the stock of Abraham, and whosoever among you feareth God, to you is the word of this salvation sent.
Ro 9:33 As it is written, Behold, I lay in Sion a stumblingstone and rock of offence: and whosoever believeth on him shall not be ashamed.
Ro 10:11 For the scripture saith, Whosoever believeth on him shall not be ashamed.
Ro 10:13 For whosoever shall call upon the name of the Lord shall be saved.
1Jo 4:15 Whosoever shall confess that Jesus is the Son of God, God dwelleth in him, and he in God.
1Jo 5:1 Whosoever believeth that Jesus is the Christ is born of God: and every one that loveth him that begat loveth him also that is begotten of him.
Re 22:17 And the Spirit and the bride say, Come. And let him that heareth say, Come. And let him that is athirst come. And whosoever will, let him take the water of life freely.