In shukladhyan (Internal state that renders the constant awareness of ‘I am pure Soul'), entire world begins to be perceived as faultless. In dharmadhyan (absence of adverse internal state of being that hurts the self and others), despite seeing the other person at fault; one will uphold him as being faultless, that is ‘dhramadhyan’. ‘What is the other person’s fault? He is only an evidentiary instrument. It is due to the effect of my own karmas that I have encountered him!

Concentration (ekagrata) is that which is with egoism,whereas meditation (dhyan) is that which remains untouched (nirlep) by the ego.

The moment the link between the meditator (dhyata) and the object of meditation (dhyeya) is connected, it is known as meditation (dhyan). When the link breaks, the meditation breaks. Meditating upon the living Gnani Purush (enlightened One) is known as visualization (nididhyasan) while meditating upon an idol (murti) is concentration!

When the Self (Atma) becomes engrossed (tanmayakar) in the resultant states of the mind, then meditation (dhyan) arises.

Wherever there is ego, meditation (dhyan) does not exist. The inherent nature of the ego is such that dhyan does not exist when the ego is present. Therefore, when dhyan arises it is a resultant state, it is not an activity. Dhyan is the effect that arises from whatever activity the ego does.

Dhyan (meditation) is an effect. An effect cannot be 'done', it arises; it comes about naturally.

To connect the meditator (dhyata) to the object of meditation (dhyeya) is Purusharth (spiritual effort to progress as the Self) and meditation (dhyan) is the effect [resultant state].

For the one whose adverse internal meditation that results in hurting the self (artadhyan) and  adverse internal meditation that results in hurting the self and others (raudradhyan) have ceased, he can attain final liberation in just one more lifetime (ekavtari). 

Does one have to do dhyan (meditation) to reduce his attachment- abhorrence (raag-dwesh)? No, one needs to know the science of the vitrags (the enlightened ones), to reduce them.