Regarding Jesus' call to repentance, how do I connect the teaching in John 6 with the letter to the Laodicean church in Revelation 3? Does He call everyone, or just the elect?
The Bible teaches that the Lord must draw men and women to Himself in faith, since we are unable to do so on our own (i.e. John 6:44). But the Bible also teaches that the means God uses to accomplish this process is by a public call to repent and believe, which the Lord sends out for the sake of those who are chosen to hear it.
Consider these scriptures:
In each of these examples, the Lord issues a call to a crowd for repentance and belief, but the Lord expected that this call would only be heard and received by those “who have ears to hear.” Many are called in this fashion, but only a few (of those who hear the call) are chosen to accept it. This is consistent with the teaching of John 6.
Therefore, Jesus' call to repentance found in His letter to the Laodicean church is a broad call to a crowd, which went out to everyone who read the letter. Jesus told this church to come to Him for salvation; represented as gold, white linen, and eye salve. Remember, the term “lukewarm” describes an unbeliever who thinks he/she is a Christian. The church in Laodicea was lukewarm in the sense that they assumed they were saved (i.e., hot) but didn’t realize they were actually unsaved (i.e., cold). However, Christ's call was only intended to be heard by the those saved; the elect. Those who were elected to receive it, responded in faith. The rest ignored it. Notice how He ends His letter:
Clearly, Jesus was speaking to those chosen to hear His words, not to everyone. Those chosen of God will respond to the call of the Good Shepherd, as Jesus says in John 10: