The Arguments and Fights between twin flames start in the beginning of the third phase, after they’ve been together for a while.
You’ll notice that none of you can actually ever ‘win’ an argument… you just keep throwing words at each other.
That’s because your twin flame is your other self.
Imagine arguing with yourself standing in front of a mirror.
Your behaviour is perfectly reflected back to you. The Image won’t stop until you do.
The arguments between twin flames, in this phase, don’t really have any meaning. You’ll argue at almost anything (Nothing of which, by the way, will matter once this phase is over).
These arguments actually have a very deep reason…
This actually has the main purpose of clearing all the ‘Karma’ and negativity that we’ve accumulated over the hundreds and thousands of incarnation.
The mind, however, doesn’t really understand this divine purpose.
(And that’s why we don’t like this when it happens)
Your Twin flame, like a mirror, reflects all that you hold inside you.
This includes things which you might not even know are inside you.
What we consciously know about ourselves is normally only what we’ve been in this present incarnation as a human being.
The present incarnation is only one of our many incarnations which we do not consciously remember. Most of us have had thousands of human incarnations since we first came to this planet.
Now, we carry from many of these incarnations, some ‘residue’, in the form of negative emotions and feelings or negative belief patterns.
These hold us back from rising up to higher energy levels and fully enjoy ‘being’.
This process of accumulating this negativity basically began from the pain of separation from our twin flames from the First Split.
And since then we’ve been collecting layers and layers of this in our soul memory.
The conscious mind only knows what’s happening in the present incarnation. The soul memory is generally not accessible to the conscious mind. We have, in a way, a new mind for each incarnation but the soul memory remains the same, always.
Our twin flame, being another part of our soul, reaches the very depths of our being.
The accumulated negativity that has been sitting there for thousands of years gets shaken up so that it can come to the surface and be released or transmuted into Love.
This is necessary in the last incarnation of twin flames as these layers must be released and transmuted in order for the soul to move to another level of existence.
Your twin flame pulls out all that is deep inside you to the surface for resolution.
This is a truly divine process through which twin flames cleanse each other and clear out anything that is not love.
To the conscious mind, which doesn’t understand the deep meaning of this, these arguments and fights seem confusing and troublesome.
You might at this point start blaming your twin flame for making you feel terrible all the time…
In reality it is not your twin flame or the arguments which make you feel this way… It is the layers of residue which you are releasing.
Your twin flame is only bringing them out on the surface.
We are not used to this and consciously don’t realize what is happening. This is something that only a twin flame really does with this great intensity .
Other people and karmic relationships do help us release some of these layers but a twin flame really stirs them all up.
This causes confusion in the mind.
You might think your twin flame is making you feel all this because you don’t know that it is actually carried by you.
The twin flame energy is like a shower of Love. It washes away all that is not love from your being. (but to be washed away, it has to first become visible and come to the surface)
Your mind might doubt this truly sacred Love in this period of time because you think love (or someone who loves you) can never make you feel this way.
Understand, that this is a Twin flame’s love. The deepest that there is… not only on Earth but in the entire universe.
This is your other self who cleanses you from deep within where no one else can ever reach in the way that a twin flame can.
You soul knows this. Your mind doesn’t understand it, especially while it’s happening, and gets very upset and confused.
This is the reason that people say a twin flame relationship is, along with being the most beautiful one, the hardest of all.
Yes, It can be hard… as you are releasing layers of thousands of years of residue from within you…
But know that this a part of the Sacred twin flame relationship which ultimately only benefits both of you.
(Article source: theeternalbliss.wordpress.com/2011/10/02/why-twinflames-argue/)