1) Being mindful to the present moment and its content, the only existing reality.
That is to pay attention in a non-analytic and non-decisional way to the current and concrete reality of the NOW, the only reality that exists. In this space-time called NOW we experience true reality in many ways such as being mindful to our body, what we are doing, the use of our 5 senses to sense and scan our surrounding environment. Daydreaming in the past and future made of zillions of thoughts, feelings, regrets and expectations is definitely not Zen since they are the products of or restless mind and therefore pure virtual realities even if they exist.
During a 2014 retreat in France, famous Zen Master Thich Nhat Hanh asked:
“ Do you want to know what meditation is all about?”
His students were eager for the answer.
“He said: “ The secret of meditation is “thoughtless thinking” that is focusing w/o analysis, w/o judgment and w/o decision. It is practicing mindfulness in its purest form that is JUST BE……JUST BE IN THE NOW