Our meditation topic works like the Headband-tightening Mantra.
When we sit in meditation, we have to catch the little monkey. The human mind is like a wild horse. Our thoughts are as restless and naughty as a monkey. If we don’t catch that monkey, it will just keep giving us the runaround. Our essence and spirit will be scattered and our energy source will become depleted to exhaustion. The energy source of the self-nature is very precious. If it is depleted by the monkey for no rhyme or reason, then it is really not worth it. Now, we need to train the horse to obey instructions and tame the monkey so that it will be obedient. This means you have to tame the wild-horse mind and monkey-like thoughts. How do you do it? You need to tie on a golden headband and then chant the Headband-tightening Mantra.
In the novel Journey to the West, as soon as Xuan Zhuang, the Tang monk, chanted the Headband-tightening Mantra, the monkey-god, Sun Wu Kong, became very obedient. What is our Headband-tightening Mantra? The inquiry into ‘who’ in our meditation topic “Who is mindful of the Buddha?” will work. Use it and the monkey-like thoughts will become obedient. Since the monkey in our mind does not know who that ‘who’ is, it will concentrate single-mindedly to search for it. Once our monkey-like thoughts quiet down, our mind will attentively concentrate in its search and our thoughts will no longer give us the runaround. If you can catch the monkey and tame it, then your skill is almost there!