There is an accumulation of energy at the sex-centre, a great accumulation of energy, and those who have control over these energies succeed in mastering them and raising them up, and they place them here (Mother points to the centre of the chest). And here is the centre of the energies of progress. This is what is called the seat of Agni, but it is the energies of progress, the will to progress, that are here. So the energies concentrated in the sex-centre are pulled upwards and placed here. And they increase considerably, so that the sex-centre becomes absolutely calm, peaceful, immobile. <ref>http://incarnateword.in/cwm/06/24-march-1954#p9</ref>
==Concentration Between the Eyebrows==
If the concentration goes naturally to the centre between the eyebrows which is the centre of inner mind and its thought, will and vision, there is no harm in that. <ref>http://incarnateword.in/cwsa/30/the-value-of-visions#p26</ref>
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The power of concentration in the eyebrows is to open the centre there, liberate the inner mind and vision and the inner or Yogic consciousness and its experiences and powers. From here also one can open upwards and act also in the lower centres; but the danger of this process is that one may get shut up in one's mental spiritual formations and not come out of them into the free and integral spiritual experience and knowledge and integral change of the being and nature. <ref>http://incarnateword.in/cwsa/29/concentration-and-meditation#p43 </ref>
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Brain concentration is always a tapasya and necessarily brings a strain. It is only if one is lifted out of the brain mind altogether that the strain of mental concentration disappears. <ref>http://incarnateword.in/cwsa/29/concentration-and-meditation#p60 </ref>
==Concentration in the Head==