妙法蓮華經玄義 6.44

6.44

若解四意，一切低頭舉手，福不虛棄，終日無感，終日無悔。若見喜殺壽長，好施貧乏，不生邪見；若不解此者，謂其徒功喪計，憂悔失理。《釋論》云：「今我疾苦，皆由過去；今生修福，報在將來，正念無僻。」得此四意也。

If one understands these four meanings, then with every bowing of the head and raising of the hand, blessing is not discarded in vain; though having no stimulus all day, one has no regret all day. If one sees someone fond of killing having a long life, or someone fond of giving being poor, one will not give rise to wrong views. If one does not understand this, one will say that their effort was in vain and their plans lost, grieving, regretting, and losing principle. The [Mahāprajñāpāramitā-]śāstra says: 'My present sickness and suffering are all due to the past; cultivating blessings in this life, the retribution is in the future; keep right mindfulness without deviation.' This attains these four meanings.