Only with the power of meditative concentration can the manas be deeply touched.

When the power of meditative concentration (samādhi) is insufficient, reading an article is like a cursory glance at flowers from horseback; when the power of concentration is sufficient, the degree of recognition in the mind is extraordinary—enough to shake the heart, to shake the five internal organs and six viscera, and the feeling is very unusual. Some people skim through an article once, unable to deliberate in detail, and rashly reject it, only to find in the end that they themselves were wrong. Where did they go wrong? They lacked the power of concentration and could not engage in contemplative practice (vipaśyanā-caryā); their minds were too shallow. Even with guidance, they still cannot practice contemplation, and their wisdom cannot gradually improve or advance day by day. Those whose wholesome roots from past lives are insufficient will not be startled by any dharma they read; it all passes by blandly, as if they truly understood it.

Only when there is power of concentration can deliberation be detailed and one be deeply touched—this is called being profoundly moved. Look at how rich in content our ancient Huaxia culture is, and how precise its wording: it can describe the states of body and mind clearly and thoroughly. There is a certain scientific basis for it, a physiological basis. The Buddha-dharma does not stand in isolation; it depends on whether people have the wisdom to recognize it as it truly is. The "deep" in "profoundly moved" means penetrating deep into the manas; only when it is not the shallow, surface-level deliberation of the mind consciousness is there a genuine stirring. Ordinary deliberation produces no stirring, no sighs of emotion, let alone a flood of deep feelings.