【正确答案】Although little grass has never been said to be Herculean, its power displayed are unmatched in the world. It is an invisible force of life. Where there is a life, there is a force. The rock above is never heavy enough to prevent it from growing because it's a kind of persistent force that keep it growing, an elastic force that can shrink and expand, and a tenacious force that will not stop growing until it's grown.
A seed full of life, which happens to be planted not in the fertile soil but in the debris, may never be pessimistic and sad, for resistance will contribute significantly to its stubbornness. The grass that fights against the tough environment from its infant age can be called "tenancy" and only the grass that fights its way up has the right to laugh with justified pride at those planted in the glass houses.