Low-vibrational thoughts & emotions also all subscribe to a lack mentality. In order to maintain jealousy, anger, betrayal, FEAR, etc., they all are of a victim mentality that we have been done wrong, we don't have or are not enough, etc. Holding those emotions mean that we "draw" lack to us.
So think about it... in order to not be "in lack" what does one have to release from their energetic field? When you wonder why you "lack", go to what you fear. This will tell you much more than you realize. For it is in our fears that lack resides.
Every time we "claim" not having, we claim lack. Every time we unevenly "take", we create lack. Every time we "over give" energetically, we create lack for the other person who is operating in a "take, take, take" mode. Are we participating in equal exchange?
Look at every exchange. Is there equal participation energetically? This can be an emotion, a thing, money, whatever... doesn't matter, because it is all energy.
By giving as much as we receive, we start to even the scales towards balance. A natural reaction to lack mentality is to take more, keep more, safeguard more. And in doing so, we over-take energetically. Giving with gratitude, without expectation, actually opens our "lack" to reverse it. What we do for another freely, without ties, returns to us "many fold".
So the next time you wish to see where you lack, see where you are over-taking or over-giving and where there is a lack of balance. And when those who come to drain you (emotionally, physically, psychically, energetically, whatever), when you give in, you feed their lack and create the same in return for yourself. Holding others to maintain balance allows you to maintain balance, which creates balance in and ease in flow.
Many also seek to manifest, while still in negative thought patterns of lack. Laws of Attraction give us exactly what we transmit. If we think lack, we draw it to us. If we focus on what we don't want, the same happens. Be very conscious to focus thoughts "forward" on what we do want instead. In addition, be aware of whether you are open to receive. Are you paying attention if the universe answers in a way that you don't expect. Will you "miss" it by putting limits on the specific thing you "see". Abundance can come in any form, and if we are not open to receive it, may pass us right on by.
Find a place of gratitude and come to a place of peace within your heart. When the heart is abundant, then the universe follows. When the heart is abundant, then we are giving freer, therefore opening to receive more abundance. Lack goes when we release ourselves from the restrictions of need. Need creates desperation, causes us to focus on what we don't have, therefor creating further lack.
Which vicious circle cycle do you participate in? Are you in a cycle of love, gratitude and free flowing abundance in every aspect or is there a place that you lack?