What made Buddha's meditation method unique?

What is unique to Buddhist meditation is the object of observation, specifically, the lack of true establishment of the self and of phenomena. What makes (any realization you seek) last long term is repeated familiarization with it - so, if you seek loving-kindness you have to stabilize your understanding of it, its characteristics and its validity through yzing it and then trying again and again to single-pointedly concentrate on it until you no longer need to fabricate it with reasoning, until it becomes spontaneous. So, because of this reason, the lack of true establishment of self and phenomena, the mind can be tamed and our state of mind can be improved infinitely. In fact, the nature of the mind is said to be clear and luminous and it is our concepts and actions arising out of a lack of deep awareness of the nature of reality (self-grasping ignorance) that keeps us bound to the wheel of cyclic existence. These stains can be removed in the same way dirt can be removed from a cloth. The first time you try it, maybe it doesn't come out, but over time, with a sustained effort - the appearance of the stain will fade and then be gone. These negativities of mind - like the opposite of loving-kindness, the opposite of compion, the opposite of wisdom, the opposite of mindfulness can be lessened and eventually eradicated altogether through applying their opponents. What causes our suffering? What is the specific origin of it? Once this has been ascertained, you then begin to investigate what path you should take to be rid of it. And for this, you need wisdom, specifically, the wisdom realizing emptiness. At least a theoretical understanding at first. This is the truth of path; this is the jewel of the buddhadharma that sets it apart from non-buddhist traditions which also ert things such as mindfulness or calm-abiding, even those buddhist schools that ert insight or vipana by taking an object of observation such as the breath. These alone are not sufficient causal factors for liberation or enlightenment. Meditation is not enough and wisdom is not enough; but they are both necessary in the same way a bird needs two wings to fly. In fact, the Dharma Master Atisha has said that either of these by themselves is . Best wishes to you for your ultimate happiness and may all sentient beings be free from suffering and the causes of suffering!