When we do not think of a weight as a burden, it does not any more weigh with us. When there is no weight on either side the needle of the weighing balance is steady and straight.
Think of the ‘good’ and ‘bad’ as the two side-plates of such a balance. On whichever side you may place a weight, the balance is going to tilt.
So neither the experience of the unpleasant nor the emotional excitement that might be caused by the pleasant should be allowed to tilt the needle of the balance from its normal equanimous position.
The ‘good’ also should not ‘weigh’ with us. That is the ‘titikshhaa’ of the ‘good’. In all that we have said what we call ‘good’ is not with respect to our spiritual progress.
It is what we ordinarily call ‘good’ from our mundane material world, that is, what pulls us away from progress on the spiritual path. There is a certain negative aspect in these ‘good’ things, that is not there even in the ‘bad’ ones.
When we meet with something that is pleasant and happy for us, we always wish that it should happen again; we want ‘more’ of it. This peculiar desire that the ‘good’ should repeat is called ‘spRhaa’ in Sanskrit.