Except for Jn 6, as explained in post #79.
v. 15 - I lay down my life for the sheep.
v. 26 - You are not my sheep.
1) I’m sure you meant John 10.
2) 10:15 speaks of “the sheep”, we are all part of “the sheep”, for we have all gone astray. “He is the atoning sacrifice for our sins, and not only for ours but also for the sins of the whole world.” (1Jn 2:2)
Note, “not only ours”, those who are currently believers, “but also for the sins of the whole world.”
Also, Jesus is speaking specifically about Jewish/non-Gentile, my sheep referring to Jews. The “other sheep not of this pen” are Gentiles. “My sheep” are not the class of the elect.
3) Jn 10:26 is not in the same context as 10:15: the context changes at vs 22, so they are not directly connected.
There are some for whom Jesus did not lay down his life, as is plainly seen in his high priestly prayer at the last supper, stating for whom his sacrifice was offered (Jn 17:9, 2, 6, 24).
He did not pray for the world, but specifically excluded it.
He prayed only for those whom the Father gave him,
just as all the sacrifices at the temple were offered only for God's people, and not for the world (Lev 16:34),
which was specifically excluded from the temple.
John 17 is about the disciples (the 12, and the others who had believed and followed Jesus.) At verse 20, he extends the prayer to include all who will also believe.
Again, in addition to 1 Jn 2:2, the Bible teaches that “… the grace of God has appeared that offers salvation to all people.” (Titus 2:11) And, “Consequently, just as one trespass resulted in condemnation for all people, so also one righteous act resulted in justification and life for all people. For just as through the disobedience of the one man the many were made sinners, so also through the obedience of the one man the many will be made righteous.” (Rom 5:18-19)
Doug