John 6:36-37

“But I said unto you, That ye also have seen me, and believe not. All that the Father giveth me shall come to me; and him that cometh to me I will in no wise cast out.”

John 6:39-40

“And this is the Father’s will which hath sent me, that of all which he hath given me I should lose none, but should raise it up again at the last day. And this is the will of him that sent me, that every one which seeth the Son, and believeth on him, may have everlasting life: and I will raise him up at the last day.”

John 6:44-45

“No man can come to me, except the Father which hath sent me draw him: and I will raise him up at the last day. It is written in the prophets, And they shall be all taught of God. Every man therefore that hath heard, and hath learned of the Father, cometh unto me.”

John 6:64-65

“But there are some of you that believe not. For Jesus knew from the beginning who they were that believed not, and who should betray him. And he said, Therefore said I unto you, that no man can come unto me, except it were given unto him of my Father.”

In all of the above texts, the necessity of faith is understood, but the existence of saving faith is credited to the Father’s prior initiative to give only some to the Son. The text would have us to observe that this is a limited number, since none to whom it is given fail to come, but none can come unless enabled by the drawing power of Father.