"...but concerning the election..." (Rom.11:28)
"Knowing, beloved brethren, your election by God." (1Thes.1:4)
The Bible is a unified book, with the subject of ELECTION as a CENTRAL cord, tying many various subjects together. I read an article which said, "I see election, election, election from Genesis to Revelation." That statement is true - God, as Sovereign, has chosen (or elected) the purpose for His creation and His ELECTIVE purpose will be carried out! Election is the "eternal purpose" of God (Eph.3:11), being carried out in His own way and time. We could say that election is the purpose PLANNED; the covenants are the purpose EXPLAINED and the kingdom is the purpose REALIZED, so a unity from beginning to end.
In 2Peter 1:10-11, "election" and the "kingdom" are linked together. This is because election, the kingdom and the covenants are intertwined, as described above. In 1Thes.2:12, we are told our "calling" is "into His kingdom and glory." We shall see that God’s elective purposes will be most fully realized in the kingdom, being supported on the foundation of the covenants, esp. the Abrahamic Covenant. The important thing to note here, though, is that God has elected some things and some people, and their fulfillment is based on His faithfulness. (Rom.11:29; 2Tim.2:13)
I would like to proceed by the means of the following points: