1 Corinthians 3:13
[the quality of] each person's work will become evident [i.e., for what is it made of]. For the [judgment] day will expose his workmanship. And it will be revealed by the fire [of judgment], which will test the quality of a person's workmanship [i.e., the faithfulness of his converts].
Matthew 3:11
"I certainly am immersing you in water following [your] repentance, but the One who follows my [ministry], whose sandals I do not deserve to remove [as His slave], will immerse you people with the Holy Spirit and with fire [i.e., the punishment in hell. See verses
Ephesians 5:26
so that He could dedicate her [to Himself], after cleansing her by means of the washing of water [i.e., immersion], accompanied by the word. [Note: "The word" here refers either to a person's profession of faith (See Rom. 10:9) or to the Gospel message (See Rom. 10:17), both of which are associated with immersion].
Titus 3:5-6
He saved us, not because of any good deeds we ourselves had done, but because of His mercy. [He saved us] through the washing of new birth [Note: This refers to our immersion in water] and the renewing [work] of the Holy Spirit,
1 Peter 1:7
But these will only test your faith, which is more valuable than gold which, though refined by fire, eventually perishes. Your faith, [however], will [endure and eventually] prove to be praiseworthy and honorable when Jesus returns.
1 Peter 3:21
This water prefigured immersion [into Christ], which now also saves you, not by removing dirt from the [physical] body, but [by serving] as an appeal [or, "pledge"] to God for a clear conscience through the raising of Jesus Christ from the dead.
1 Peter 4:12
Loved ones, do not be surprised that you people are undergoing extremely difficult trials, as though something strange were happening to you, for it is [only] a test [of your faith].
Revelation 3:18
[Because of that], I advise you to buy from me gold, refined by fire, so that you will become rich; and white clothing to wear, so that you can cover yourself and not be seen as shamefully naked; and eye drops for your eyes, so that you can see. [Note: The foregoing all refer to taking measures for becoming more spiritual].