Don’t fill the crack, recognise that your flaws exist and they are your path to salvation- the path to an enlightened you. There must be someone that you like, someone who inspires you and you even envy him/her a bit. Don’t worry. This attraction..this pull towards that person means something. You have to be like him/her. And that’s how the light comes in through your crack. Your flaw took you to improvement! See!
Let the light come in.