Excellent post @damira! When I first started the post I thought your were going to espouse the concept of selflessness, which I s\strongly disagree with, and as you elaborated on your thoughts I saw you were talking about being a servant-leader, in the sense that you try to have a mindful; positive impact on all those around you without thinking of how it will enhance your own standing. That is also a precept of mindfulness, in doing the right thing and serving without being attached to the outcome.
The only thing we truly control in this life is our own actions and choices, but we do not live in isolation from others. We lift ourselves up through service to others, but we do not rely on others for our self-worth: We are intrinsically valuable just the way we are, in the present moment. A happy life Is about balance, self awareness and outward charity/service existing together in harmony.
Thanks again for the positive thoughts! Upvoted and followed.