“Madness as you know is like gravity, all it needs is a little push….”

This line, spoken by the character of Joker in Dark Knight, is of such profound meaning and philosophy that may not have been portrayed or delved into in any movie till date. (This is my personal assumption as I can’t claim to be a thoroughly knowledgeable person in world cinema, and thus shouldn't be held liable for the same.)
It is a dialogue which has stuck with me long after other aspects of the movie have become a blur. I can identify two reasons as to why this still lingers in my memory with such clarity and impression. First reason is the impact of the dialogue delivery by Heath Ledger. Second reason is the provocativeness of the dialogue to make one think of the implication behind it; the very vision it conjures up.
All I could think of is how true the words are actually. In the rational world we are conditioned to keep our irrational (so called) urges under reign; put a tight lid of reason on it and try to forget their existence. Reason is what stipulates the boundaries of morality. My intellect and understanding capability further makes me reflect at length, and come up with my following perceptions. I perceive madness as an integral part of our being, our essence. But such a part which is denied to be expressed because we have been burdened (or cursed?) with the responsibility of being civilized and walk on the path of morality, for aeons and aeons to come. The demands of life, of survival and progress takes such a toll on our intellect that we are placed on the edge of sanity. We spend our entire life struggling to hold ourselves back and not get over powered with the impulse to take that one voluntary step to plunge/hurl ourselves into the waiting arms of madness and get the taste of the forbidden fruit.
Though the unknown has always tantalized our curious nature for exploration but in this case the abysmal fear of the unknown and the burden of societal relegation have been strong enough to stop us from severing the strings of reason, which acts as the salvation. Reason: our embraced comrade in arms; in the quest to prevent the unleashing of the "demons of chaos".
Since we have been forever conditioned to be a perpetual coward; so factually what we really need is indeed just a stimulus in the way of a push (figuratively), which will make us overcome our fear, conscience and will propel us to fall and set ourselves free of reason. Thus make us head for an experience in freedom, which I believe would be, the greatest of all!

[Madness is defined as – the state of being mad; insanity. Mad is defined as – is a mentally disturbed; deranged; insane; demented.]