"If a righteous person sins, then all the good that they may have done will not save them.  And if an unrighteous person repents, and turns away from sin, then their sins, though they may be many, shall not be held against them."  Most of the churches emphasize the second part, and often omit the first part.  Repentance isn't an "I'm sorry".  Repentance is to never do it again.  Too many churches teach that nobody can be perfect, that you're always going to sin.  I say that they are always going to sin ... and that some of us are earnestly trying to quit sinning any sin whatsoever.