is better avoided. Talking about sadhana also comes under the category when it is merely mental discussion of a superficial kind.Sri Aurobindo
Letters of Sri Aurobindo
09. Transformation of the Physical (2)
Fragment ID: 3582
On the whole you are right. Useless conversation which lowers the consciousness or brings back something of a past consciousness is better avoided. Talking about sadhana also comes under the category when it is merely mental discussion of a superficial kind.