For if we died with him, We will also live with him.
2:12 If we endure, We will also reign with him.
If we deny him, He also will deny us.
2:13 If we are faithless, He remains faithful. He can't deny himself.
The Conditional Clauses of verses 11-13
2Tim 2:11 = An eternal security verse
If we died with him, (ONCE SAVED)
we will also live with him; (ALWAYS SAVED)
"died" is in the aorist tense indicating something that occured at
a distinct point in time. Things that occur in the perfect tense or aorist
tense are not subject to change, unlike those in the present tense. And
therefore once such a condition is satisfied, there is no way back.
if we endure, we will also reign with him.
"endure" is present tense (really "if we are presently continuously
enduring")
A Christian who does not endure will not be saved.
The only logical way to resolve the apparent contradiction between these two verses is by a doctrine known as "The Perseverance of the Saints", which is simply the idea that once saved, God causes the believer to endure to the end as well as satisfy any other verse that appears to make salvation based on a person's performance. Such an internal change in those born of God is described in 1John 3:9.
If we are denying him in a present continuous sense, he will deny us."denying", being in the present has its emphasis on continuity. Had it been in the aorist, it would be referring to "denying" at a point in time, like Peter had done. The condition here seems to leave no room for repentance. This may be an application of Heb 6:4-6.
"For it is impossible for those who were once enlightened, and have tasted of the heavenly gift, and were made partakers of the Holy Ghost, And have tasted the good word of God, and the powers of the world to come, If they shall fall away, to renew them again unto repentance; seeing they crucify to themselves the Son of God afresh, and put him to an open shame." The promise is not one of eternal life for this person, but rather this describes a similar type of person as one who denies him. Such a person does not have a promise of eternal life, but on the other hand, God will not react to him as he has done to God. (Again another Heb 6:4-6 type, or 2Peter 2:20-22)