Arkady wrote: For example, creativity. I work as a freelancer as a designer in Photoshop. Very much I worry, when there is no success.
Why? When there is no success you should be happy and celebrate. Learning how to celebrate failure is a valuable life skill.
When you do not experience success, what is the worst thing that happens? Do you starve, does someone beat you with a stick, is the penalty that you must cut off a finger? No. I doubt there are any truly negative consequences when not successful. You still get to eat, no one beats you and you keep all your fingers.
The next time you fail, write down all the bad things that did not happen to you. It will help you gain some perspective about what is actually important in life.