You don't need to be ready to forgive in order to practice what it might feel like to do so. This short writing practice allows you to simply play with the language of forgiveness. It can be really cathartic and a great way to bring positive, loving energy into an otherwise challenging scenario.
If there is a person in your life that you feel has wronged you in some way, then thinking about them or what they did probably carries a charge. Maybe when you think about them or the situation, you feel a tightening somewhere in your body, or you think negative thoughts. Practising forgiveness, even if you tell yourself that you absolutely don't mean it, may well make you feel a little better. This exercise isn't about them, it's about giving yourself a bit of loving care.
To try it, grab a piece of scrap paper. Tell yourself that you are going to tear it to tiny pieces after you finish writing; nobody need ever know what it said. You don't even have to read it back to yourself if you don't want to. You may choose to write the person's name at the top of the page or not. Then write them a letter of non-forgiveness! There are many different ways to begin but my favourite opening lines are:
'I don't forgive you but if I did I'd say....'
'I forgive myself for not forgiving you for....'
Those openings give you total permission to write whatever you like, don't they? Nobody's going to read what you write. You don't even mean it, so go to town! Practice the language of forgiveness. Play with the words and notice how you feel as you do. If you can, write quickly. Keep your hand moving, without giving your head time to think too deeply about your words. The resulting piece of writing might be messy. It might even be nonsensical. Who cares? You have total permission to let whatever wants to come out, flow onto the paper.
Check in with yourself afterwards. Notice how you feel. Has anything happened to that charge? If there was a tight feeling in your body before, how does it compare now? How do you feel about the situation, the person, yourself and the subject of forgiveness? You might be surprised. Words really are magic. Go to town with them; cast some spells.