Perhaps you heard of yogis meditating in blissful consciousness, in the absolute, in the oneness, according to how a particular yogi defines these experiences. Some yogis denounce bliss states as being part of the dualistic feature of relative consciousness which alternates between happy feelings and distressful sensation or happiness, insensitivity and distress.
For meditation, for me, blissful states will do, not just happy bliss but even neutral bliss states where the happy feature is such a small part of it as to be near absent. The mind chamber is such that if there is no bliss state in meditation there is a reluctant to remain in the absorption in that indifferent state. There is little or no self-attraction then.
The inner consciousness is drab and featureless which lacks the holding power for deep samadhi practice. When the self is featureless the yogi has little to keep for a focus. Then the mind twitches and turns as it impulsively seeks sense objects, memories and mental constructions which satisfy its need for preoccupation.
Steadiness in meditation happens when there are bliss states, even near neutral bliss states, where the yogi finds that there is effortless absorption within the psyche with no urge to venture outside the being and no feeling of a need to get or procure anything because the bliss yielding energy is such that it is totally satisfying and of itself causes a deep sensual energy withdrawal (pratyahar) with a samadhi containment occurring with no extraneous effort.