1. A journey of a thousand miles begins with a single step. 2. You can travel a thousand miles without accumulating steps. If you don't accumulate small streams, you can't make rivers and seas. 3. You can't smell plum blossom without a bitter cold. 4. Bao Jianfeng comes from sharpening, and plum blossom fragrance comes from bitter cold. Large quantity is the key materialist dialectics holds that the principle of dialectical relationship between quantitative change and qualitative change: quantitative change and qualitative change are two States of things' development. The change and development of everything begins with quantitative change, which is the premise and necessary preparation for qualitative change. When the quantitative change of things reaches a certain level, it will inevitably lead to qualitative change, which is the inevitable result of quantitative change. Things constantly go through the cycle of quantitative change-qualitative change-new quantitative change-new qualitative change, from low to high, from simple to complex and never-ending development. Methodological requirements: we should attach importance to the accumulation of quantity, adhere to the principle of moderation, and make a leap without losing time. Oppose ignoring the accumulation of quantity, be eager for success, and be blind and reckless; Oppose ignoring the qualitative leap, look forward and backward when conditions permit, shrink back and delay the opportunity. I don't feel anything every time I eat a bowl of rice, but I'll be full after another bite of soup.