"Repent" means to change our minds, when we repent we change how we view ourselves, realizing we have a sinful nature that we cannot fix ourselves. Believing in Christ is knowing that only Christ can fix that sinful nature and only if we want Him to change us into a new creation.
This mentality is merely "religious" it is not the repentance of the Bible nor does it do anything except to pretend to be something someone is not.
Religion is a system of rules that people follow to feel safe but does nothing to develop a relationship with Christ. A set of rules followed does not save anyone. Appearing superior because of rituals does not save anyone.
Only humbling oneself and admitting they are sinners who cannot do anything worthy of salvation, then trusting what Christ did for them to pay for their sin, desiring to be changed into a new creation by Christ will cause the Lord of the Universe to save this repentant person.
The very first step in salvation through Christ is realizing how totally worthless we are and the need we have for a Savior.
Jeremiah 17:9-10
“The heart is more deceitful than all else And is desperately sick; Who can understand it? I, the LORD, search the heart, I test the mind, Even to give to each man according to his ways, According to the results of his deeds."
May all those who are not sure of their salvation and have been practicing "religion" be encouraged to abandon that religion and trust in Christ.