What is success to you?
When you focus on the distance between where you are and where you want to go, you will inevitably get sad and depressed.
When you focus on how far you've come, you feel more confident and good about yourself.
Absolutely have a vision and a goal.
But you'll go crazy if you focus on that every single day and beat yourself up because you're not there.
Success is found in an optimal daily experience, not in reaching a goal post.
Don't focus on far you have yet to go.
Be grateful for how for you've come.