The infamous verse of John 3:16 says ...that whosever believeth shall not perish but have eternal life... Beleiveth is a present participle and if reread concerning this it would read : ...whosoever believing shall not perish... it's a state of currently believing. I really don't like the once saved always saved mantra that some churches put out its deceiving and I always struggled with it concerning scripture and never got a good answer when I would ask my pastor or deacons. No blame on them but it was church doctrine and I believed it for a time.
Hi JFA, it looks like you are pretty new here, so first off,
WELCOME TO CF ..
As for John 3:16, you're right, "believeith" is in the present tense, which signifies something that is a "present" AND ongoing possession of one who has come to saving faith in Christ.
This may be helpful as well (as the Lord goes to great lengths here to get His meaning across to us):
John 5
24 “He who hears My word, and believes Him who sent Me, has eternal life, and does not come into judgment, but has passed out of death into life"
IOW, someone who has come into the possession of saving faith and "believes" "
has" (present tense)
ETERNAL (
not "probationary") life, at that very moment in time

The Lord then goes on to say that those who have come into possession of this kind of "life", will not be judged or condemned, because they have ALREADY (perfect tense) passed from death to life (the perfect tense speaking of an action that has already been completed).
As for the perseverance of the saints (which is accomplished by God), which concerns any who have truly come to "know" God/have become true believers, what do you do with the passages teaching that we have been given "
eternal" life (e.g. as was just seen above), and/or with those passages that teach that of
all who are "drawn" and come to Christ, that
NONE will be lost ..
John 6:37-40 (or of the promise made to us by our Savior that we, His sheep, those He has given "eternal life" to, will
never perish ..
John 10:27-28)?
John 6
37 All that the Father gives Me will come to Me, and the one who comes to Me I will certainly not cast out.
38 For I have come down from heaven, not to do My own will, but the will of Him who sent Me.
39 This is the will of Him who sent Me, that of all that He has given Me I lose nothing, but raise it up on the last day.
40 For this is the will of My Father, that everyone who beholds the Son and believes in Him will have eternal life, and I Myself will raise him up on the last day.
44 No one can come to Me unless the Father who sent Me draws him; and I will raise him up on the last day.
John 10
26 “But you do not believe because you are not of My sheep.
27 “My sheep hear My voice, and I know them, and they follow Me;
28 and I give eternal life to them, and they will never perish; and no one will snatch them out of My hand.
Just to be clear, I realize that there are passages and verses that seem to teach that our salvation can be lost. Those MUST be reconciled with passages like the ones I've posited here however, IOW, this is NOT (nor can it ever be) a competition between whose Bible verses are "better"
Thanks!
Yours and His,
David
p.s. - the thing about the OSAS, that people often seem to forget, is that to be "
always saved", you have to be really and truly "
once saved" first

Salvation by faith is far more than an intellectual ascent/belief in God (because the demons all do that much (and more) ..
James 2:19, they also "shudder", but they are certainly not saved)!
"He is able to save forever those who draw near to God through Him,
since He always lives to make intercession for them"
Hebrews 7:25
.