Then Peter said unto them, Repent, and be baptized every one of you in the name of Jesus Christ for the remission of sins, and ye shall receive the gift of the Holy Ghost. And with many other words did he testify and exhort, saying, Save yourselves from this untoward generation. And they continued stedfastly in the apostles' doctrine and fellowship, and in breaking of bread, and in prayers. In the Bible believer equals obeyer. One calls on Jesus Name by being baptised in Jesus Name.
Grace offers that opportunity to have one's sins remitted.