undersatnd a X

DO you undersatnd your friend? do you know how your dearest one react to any situation...though we say about any one and claim that you know everything abt them...i dont really agree to this point...every person X behaves differently to different situations..its quiet impossible to come to a conclusion abt a persion X, though you spend 20 out of 24 hrs with him...so its really quiet impossible to treat some one as good or bay..a bad may be good some times and a good may be bad many times.. so keep moving and dont come with any conclusion...but do good frm your side and that is the universal principle...