Eight-character idioms with the numbers one and six

One person attains enlightenment, a chicken or a dog ascends to heaven. One person is inferior to ten thousand people. Nothing can be gained without experience. The Tao is as high as one foot and the devil is as high as one foot. One word and it's hard to catch up. Raise an army for a thousand days and use it for a while. I only know one but not the other. One man can guard against ten thousand men. It is easy to get a thousand armies but hard to find a general. Once a teacher, always a father. It is better to do less than to do more. This is the only one with no other branches. A leaf can obscure the view of Mount Tai. Not seeing each other for one day is like three autumns. no pain no gain. Be wise and confused for a while. One careless move and everything is lost. After seeing off the army for thousands of miles, it is necessary to say goodbye. Pay the money in one hand and deliver the goods in one hand. Life is full of vegetation and autumn. Thirty-six strategies are the best. Eyes see in all directions and ears hear in all directions.