The gospel is very simple, Paul details the true pure Gospel of Jesus Christ in 1 Corinthians 15:
“1 Now I would remind you, brothers, of the gospel I preached to you, which you received, in which you stand, 2 and by which you are being saved, if you hold fast to the word I preached to you—unless you believed in vain.
3 For I delivered to you as of first importance what I also received: that Christ died for our sins in accordance with the Scriptures, 4 that he was buried, that he was raised on the third day in accordance with the Scriptures” 1 Cor 15:1-4 ESV
We are not to add to this and we are certainly not to contradict it (Gal 1:8). That said, sometimes we do have to take a page out of Pauls book and meet people where they are at like he did the Greeks on Mars Hill (Acts 17:22-34). When I share the gospel with SDA I have found it helps to contrast it with the false SDA gospel so that they can see the difference for themselves.
In person I try to go into greater detail, but below I’ve pasted a short simple post I use on the internet from time to time:
The reason SDA are wrong is that they teach a false gospel. See Gal 1:8, SDA teach if you fail to keep the sabbath after probation you’re damned and have the mark of the beast.
The bible says we are not saved by works of the law (Rom 3:20). Jesus died carrying our sins to the grave and rose on the third day. Conquering sin and death.
Repent and be baptized for the forgiveness of your sins and place your trust in Christ and Christ alone.
The Sabbath will not give you salvation.
The Sabbath will not give you extra assurance for the end times.
The Sabbath is no different than circumcision. The Bible says the Sabbath is obsolete.
Please leave a comment and tell me what you think. If you wish to use this then go for it, the more the merrier. If you have advice or a better blurb you wish to share, by all means please do so.