This is not an abrupt change, it's a slow process. The best way to do this is to periodically go through your wardrobe and ask yourself, does this reflect me in any kind of way? Do I feel comfortable wearing this? Am I excited to wear this? If the answer is no to any of those questions it's time to let those pieces go.
You'll learn that when you shop for the "new" you, you'll naturally gravitate towards the pieces that define you. Some people will shop for pieces that reflect their old wardrobe because their mindset hasn't changed.
I know it can be hard to let go of pieces in your closet so the best way to let go of something is to replace it. If a dress no longer screams your name, go shop for a dress that does. You'll be happy because this gives you an excuse to go shopping and you'll forget all about that item you thought you couldn't live without.
You may have an edgy sense of style but what you wear at 25 and 40 will not necessarily be the same. However, it all depends on your mindset at these ages. Usually, someone at age 40 has gained life-changing experiences that has given them a new perspective and mindset on life. So they will dress to reflect this change. Someone who is 25 with an edgy lifestyle and personal style would love these Rag and Bone Jade leggings. They're sexy and fun like many 25 year-old women are..
Someone who hasn't changed over the years will find a way to make these leggings appropriate for their new age. However any person who has matured since 25 will choose to replace them with a pair that defines their new perspective
These Rick Owens leather leggings are more appropriate for someone who has an edgy personal style at 40. You can see the refinement in style as these leggings are more sophisticated and they are not translucent on the sides.
This woman wants to preserve her sexy as she's either learned from her mistakes over the years or her values have changed.
Both of these looks are edgy but they are for two different women at different stages in their lives.
We should constantly refine our style because we should constantly make changes in our lives. Rarely will we make a drastic style change but overtime you will begin to see the difference. Remember, style is about who you are and who you are today may not be who you are tomorrow.