It is very important to generate a good attitude, a good heart, as much as possible. From this, happiness in both the short term and the long term for both yourself and others will come.
Do you want to be a power in the world? Then be yourself. Be true to the highest within your soul and then allow yourself to be governed by no customs or conventionaliti es or arbitrary man-made rules that are not founded on principle.
Accept the responsibility of being yourself as you are, with all that is good and with all that is bad, with all that is beautiful and that which is not beautiful. In that acceptance a transcendence happens and one becomes free.