Gyana, karma and meditation are closely connected. The difference is only about sattva (quality of purity, harmony), rajas (quality of activity, passion, anxiety) and tamas (quality of inertness, stuggishness, ignorance, darkness, perishable nature).

The prevalence of gyana is the prevalence of sattva, the prevalence of karma is the prevalence of rajas, and the prevalence of meditation is the prevalence of tamas. This is a terminology.