First of all, we need to clarify that you cannot build positive energy because positive energy is infinite and as natural as your blood. What you can do which appears to increase the positive is to eliminate negative energy. It’s just a balance, as one goes the other increases, in either direction.
Our essential nature is positive, proven based on the different reactions people will have to negative comments, yet consistent reactions to positive comments. To prove this, tell a group of people that they are stupid and insult them. Some will take it to heart and feel terrible, others will retaliate with aggressive comments, and others will just ignore you. Now, give a group of people positive comments, and they will all feel positive.
What is natural to a species is common to all. But what is unique in individual responses is a learnt and conditioned behaviour.
Unlimited energy can be attained only by removing that which destroys it. You cannot see two sides of the same coin at the same time but both sides are always there.
As soon as you remove negative, you will be positive. This is why we work on the removal of negative emotions which is done through self-observation to develop a truly objective view and not take things personally and other practices such as occupying your mind at all times with positive thoughts.
Being creative is the best positive activity.
What can you do to be creative? Anything.
Creative and artistic are to create out of nothing. It’s to take something blank or in any state, and turn it into something different. Find something you can do for creative expression. It is as simple as transforming anything into something else.
The mind is a machine and must be allowed and encouraged to function using its higher abilities and greater capacity of love and affection, expressed through creativity.
Loving thoughts and actions, buying a flower randomly, or a small gift of any sort, or just a spontaneous text saying you love someone, all encourage a more consistent, positive and creative mind.
Negative energy blocks creativity and the ability to love fully and passionately. When you remove enough of the negative energy from your life, your creativity and positive emotions will transform you into a totally different person, worthy of the love you seek, and more importantly, able to feel the love you want.