Dear Mr. Luka Bönisch,
Thanks for your so very helpful article.
I am in India and I believe in Hindu Philosophy (there isn’t anything like Hindu Religion). Our holy book Bhagwad Geeta is a book of Hindu Philosophy and provides insight into ways and means of getting rid of problems and living a purposeful happy life. The book itself is a collection of preaching by Krishna to his friend and disciple Arjun in battle field. The book is in Sanskrit Language.
One of the verses (verse 22 of chapter 9) reads:
अनन्याश्चिन्तयन्तो मां ये जनाः पर्युपासते।
तेषां नित्याभियुक्तानां योगंक्षेमं वहाम्यहम्॥
It means:

There are those who always think of Me (God) and engage in exclusive devotion to Me. To them, whose minds are always absorbed in Me, I provide what they lack and preserve what they already possess.

In life of each one of us there has been a period (from birth upto age 3 years) when we had behaved exactly as above, but believing in our mother for providing all that was needed.

In Chapter 12, verses 17, 18 & 19 (I am not quoting the verses in Sanskrit) Krishna tells:
The one who inculcates the capability of never being over-joyed, never feeling animity for anyone, never being in the state of sorrow and does not care for ‘auspicious’ or ‘inauspicious’; the one who remains mentally free feelings of friendliness or unfriendliness, pleasure or pain, mental sufferings from weather, deep attachment to anyone or anything and who Is unaffected by condemnation or praise and who remains satisfied by the present (doesn’t mean - not trying to look into possibilities); is a person who lives a life in bliss.
Thanks again.