Good relationships are the linchpin to success in most areas of life. Without good relationships, you're unlikely to meet the success you hope for. The more I learned this and put this into place as an educator, the more successful I was with my students and their families. Teachers have to invest in good relationships with their students, families, and colleagues in order to teach well.
That said, in any area of life, you have to think about the kind of relationships you hope for and what that means for your actions, time, and energy. If you work in a large organization, it is impossible to have close relationships with all in that organization, so you have to think about how you will relate to the people you work with. Even in small family groups, you have to think about each relationship you enjoy with care. Asking others the question, "What do you need from me or what can I do for you?" is a good starting point.
Just like a wonderful garden, you have to nurture good relationships. It is critical that you're not callous or cavaliar in this area of life if your relationships with others matter. We must be intentional, thoughtful, and attentive to the relationships we hope to nurture, and that intention, thought, and attention will lead to success and gratification.