I will certainly do my best to explain what I mean by this, thanks for asking my friend...

There are many ways to look at concentration...
But this explanation might be helpful, otherwise ask deeper...

First of all we have to distinguish between the small mind and the big mind...
The small mind is that what re-acts on all the input from our sensory system, combine them with our experience, and our 'data-bank' of knowledge, this is also highly influenced by our changing emotions and our relations, with bot a negative and a positive pull (e.g. when we are happy and people are nice to us, we operate better with this mind-set, therefor it is very conditioned by the surroundings and are linked with the solar plexus and the energy center below the diaphraghm

This kind of mind-set are good at making to-do lists, and to operate within the systems...

To embrace the moment fully we need to go deeper...

Here it is essential, first to wake the heart...
You may say that the leap of faith, is the jump form the solar plexus centered small mind, to the heart consciousness...

A way of seeing the heart consciousness is like a huge ocean, the water is clear and pure...
Yet all our emotions and outer input and how we let them affect us makes waves in that ocean...
Waves that create distortion, and makes the clarity lesser...

When we chose to stay focused in 'what is'... That is embracing the moment and just letting it melt into our awareness without re-acting, slowly the waves of the outer input/emotions become smaller and smaller...
Just observe the waves and let them flow...
At some point they'll die out and leave the surface of this inner ocean more tranquil...
That way something amazing happens...
Our inner Sun, which is above this Ocean, which is our direct link with our spirit Essence, the Father, the One Source...
We might not be able to gaze directly at this Sun,but then something else amazing dawns...
The water are so clear, that we can see through...
See how the inner true Sun, the Father, are reflected into the Depth of the inner ocean...
That way we become aware of our deep Divine Mother, which is also the One Source reflected in this world...
At this moment we may surrender ourselves into this One Source...
Surrender with gratitude and fully openness, humbly and honest ask to be filled with this One Life, and thereby our inner flame in the heart will be ignited...

This is the flame that burns so brightly from our own spirits essence, and its light will embrace and transcend all our incarnated bodies...
From the densest physical to the highest vibrating soul level...
True balance will dawn this way...
Then the flame, inner light/fire will connect via the throat center into the higher mind...
That way we will be able to speak the word of the spirit, and the higher mind will be awakened...
Or the heart-mind...
That is connected with spiritual insight, intuition, understanding, and works perfect with the knowledge of the lower mind and the love, wisdom of the heart...
The throat holds the ability to truly listen, and express the flame of the spirit through word, and by the tone and depth of your voice...

That way concentration is something that works through the heart and mind and all the bodies, and not simply an exercise for the brain...

A process of transcendens...

Does this clarify, or please ask deeper, sweet friend

Lots of love to you