Salvation mantras are what I call statements that I can make to myself to banish fear.
They can take a surprising number of forms. One of the first ones that ever worked for me was, "Save me Jesus." This is a better version of the prayer that in a Chick Tract or Left Behind movie goes, "God, I know I am a sinner, and that I deserve to burn in Hell forever. But Jesus died to save me, and I humbly accept his gift." I was stuck in one of those versions for a long time, because it seemed the more sincerely you tried to claim belief, the more God was likely to believe you. (!)
If you actually find yourself wanting to say, "Save me Jesus," then you know as well as anybody can, that you actually do believe Jesus wants to save you. That is why becoming very conscious of your subconscious fears is so important. It was in the midst of a panic attack that I realized that what I wanted most was to believe that Jesus was good, and wanted to save me. In my mind, somehow Jesus is God and still separate from God, so that He could save me from that mean, punishing God, Who hovers ominously out of sight. So, I discovered as a third party might, by asking me questions at the moment that I was having the panic attack, as to whether I believed that Jesus could/would/had saved me. And that is all it takes in the frightening fundamentalism that I grew up in, to know that you are saved forever. (Being saved, just in case you didn't know means getting whatever the best deal is that God has to offer.) So, I am covered whichever way I turn, unless there is some true religion that isn't the one I grew up in, whose God is going to toast me for not having known about Him. But it is not hard for me to believe that my-best-friend Jesus is gonna be able to beat up that God.