We know there is not a literal door that Jesus knocks on, but do know that it is the word preached to us in whom our hearts will be pricked/convicted as faith comes by hearing the word, but many that hear also reject it as their hearts are filled with the lust of the world. In todays day and age, unless you live under a rock the word of God has gone out into all the world so no one is without excuseIt sure doesn't mean that Jesus knocks at the heart of everybody in the world.
Remember, the original question asked was:
Personally, I believe it's wider than we think.
Jesus stands at the door and knocks...
Jesus is God.
God is knocking...
What if someone opens the door but has never heard of Jesus?
Rom 1:20 For the invisible things of him from the creation of the world are clearly seen, being understood by the things that are made, even his eternal power and Godhead; so that they are without excuse:
Rom 1:21 Because that, when they knew God, they glorified him not as God, neither were thankful; but became vain in their imaginations, and their foolish heart was darkened.
Rom 10:13 For whosoever shall call upon the name of the Lord shall be saved.
Rom 10:14 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?
Rom 10:15 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!
Rom 10:16 But they have not all obeyed the gospel. For Esaias saith, Lord, who hath believed our report?
Rom 10:17 So then faith cometh by hearing, and hearing by the word of God.
Rev 3:20 Behold, I stand at the door, and knock: if any man hear my voice, and open the door, I will come in to him, and will sup with him, and he with me.
Act 2:37 Now when they heard this, they were pricked in their heart, and said unto Peter and to the rest of the apostles, Men and brethren, what shall we do?
Act 2:38 Then Peter said unto them, Repent, and be baptized every one of you in the name of Jesus Christ for the remission of sins, and ye shall receive the gift of the Holy Ghost.
Act 2:39 For the promise is unto you, and to your children, and to all that are afar off, even as many as the Lord our God shall call.
Mat 22:14 For many are called, but few are chosen.