The Lord grant mercy to the family of Onesiphorus, because he often refreshed me and showed me kindness [comforting and reviving me like fresh air] and he was not ashamed of my chains [for Christ’s sake];

Paul, an apostle of Christ Jesus by God’s will, for the promise of life in Christ Jesus:

So, I endure everything for the elect's sake [i.e., God's people], so that they can obtain the salvation which comes through Christ Jesus, with [its] never ending splendor.

and how from childhood you have known the sacred writings (Hebrew Scriptures) which are able to give you the wisdom that leads to salvation through faith which is in Christ Jesus [surrendering your entire self to Him and having absolute confidence in His wisdom, power and goodness].

The Lord be with your spirit. Grace be with you.

which is by Jesus Christ, To Timotheus, my beloved son, grace, mercy, peace from God the Father and Jesus Christ our Lord.

[It is] God who saved us and called us to live holy lives [or, "to be dedicated people"], not as a result of our [good] deeds, but in harmony with His own purpose and unearned favor. [This was] given to us through [the atoning work of] Christ Jesus, before the beginning of time. [Note: Salvation through Christ was planned before time began. See Titus 1:2; Rom. 16:25; Eph. 1:4].

If we prove to be unfaithful [i.e., to our commitment to Christ], He [still] remains faithful [to His word], for He cannot deny Himself. [Note: This verse refers to Christ remaining true to His promise of either accepting or rejecting us. See Matt. 10:32-33].