'During all the days of the earth' means the whole of time. 'Seedtime and harvest' means the person who is to be regenerated, and consequently the Church. 'Cold and heat' means the state of the person who is being regenerated, which, as regards reception of faith and charity, resembles cold and heat, 'cold' meaning when faith and charity do not exist, 'heat' however when they do. 'Summer and winter' means the state of a regenerate person as regards things belonging to his new will, which by turns come and go in the way that summer and winter do. 'Day and night' means the state of the same person, that is, of one who is regenerate, as regards things belonging to his understanding, which alternate as day and night do. 'They will not cease' means that this will be so for the whole of time.