Salvation is based on what Jesus did on the cross, his resurrection from the dead, and it also has to do with ALL of the Gospel which means (good news)
Eph 1:13 In him you also, when you heard the word of truth, the gospel of your salvation, and believed in him, were sealed with the promised Holy Spirit,
Eph 1:14 who is the guarantee of our inheritance until we acquire possession of it, to the praise of his glory.
The Gospel encompasses everything spoken of by his Apostles who spoke it when being moved by the Holy Spirit. Salvation is not just believing in something conjured up in our head, or what some man said, it is based only on truth. It is vitally important that what I believe is based on the true Gospel, with right understanding (Wisdom).
There are many “other Gospels”, and many other “Jesus's” that are not of the truth.
Gal 1:6 I am astonished that you are so quickly deserting him who called you in the grace of Christ and are turning to a different gospel—
Gal 1:7 not that there is another one, but there are some who trouble you and want to distort the gospel of Christ.
Gal 1:8 But even if we or an angel from heaven should preach to you a gospel contrary to the one we preached to you, let him be accursed.
One of the “false” Gospels being spoken today is that God is love, so he overlooks everything we do no matter what it is. God even forgives fallen angels who have already been cast down into everlasting chains of darkness until they are cast into the lake of fire.
Surely God is “love” but he is also a God of "justice" as he disciplines, and chastises those who are his sons when they do wrong. If anyone who thinks they are a child and is never disciplined, then they are not a child of God!
Heb 12:6 For the Lord disciplines the one he loves, and chastises every son whom he receives.”
Heb 12:7 It is for discipline that you have to endure. God is treating you as sons. For what son is there whom his father does not discipline?
Heb 12:8 If you are left without discipline, in which all have participated, then you are illegitimate children and not sons.
Notice: God disciplines the one he loves. If we think the Lord just overlooks our wrongdoings we are deceived into believing something that is not the Gospel of our salvation!
It makes no difference if our love for others is so great we give up not only our lives but give away everything we own. That also is a deception, and not the Gospel!
Anybody can do such things if they really believe they know and have the truth!
Known terrorists who do not know the truth lay down their lives all the time for what they believe. The only problem is they are believing the lie.
1Co 13:3 I may give away everything I have to help others, and I may even give my body as an offering to be burned. But I gain nothing by doing all this if I don't have love.
We think doing these things proves we have God because God is love!
This scripture says you can do these things and not have God (love)!
All believing must be confirmed in the scriptures, and without that, we do not know or have the truth that we think we have!
If we believe anything contrary to the revealed Gospel it is a lie.
Love is not a whooy gooey feeling inside us that makes us feel good when we say and do things, it is a person.
Those who have salvation understand these things fully because God the Father, Son (Word of God), and Holy Spirit bear witness to every truth!