Why am I never happy, also when I reach the goals that I have set for myself?

It’s because you do not let yourself to be guided by Who You Really Are.
Nevertheless, since you are a Divine Being, very ofter you do not realize that you have followed exactly what your Deep Feelings have suggested you to do, You remain attached to a goal that you have set for yourself, and you are trying to make up for the sense of lack by acheving your goal.

When you let go of this illusory manner, you will realize that you have already the fullness that makes up for the sense, and therefore, you will feel joyful,satisfied in everything that you are doing whitout expecting a result. Is a growing process for you, and that you have chosen in the incarnation of which you are aware of. You are finally getting the awareness, because when you realize that despite you have reached your goal, you are again feeling that void, is the invitation for you, to open your eyes, open your awareness to the fact that you are the fullness, and nothing of what can appear other outside of yourself, can give you what you Already Are.
Is it clear for you?

More or less.

Let go of the expectation and the mental reasoning, and you will discover the fullness that You Aready Are.

Excerpt of a Channeling from the Source session
of il 05.04.2023