вспоминая о прежних горестях, думать о будущих радостях

вспоминать горе и думать о счастье

回忆过去的苦难，回想今天的幸福生活。

to view one’s past as miserable and one’s present as happy (idiom)

recall one's sufferings in the old society and contrast them with the happiness in the new; bittersweet memory; call to mind one's past sufferings and think over the source of the present happiness; compare one's happy life in the new society with one's misery in the old; contrast past misery with present happiness; recall one's family's suffering in the old days and tell of one's happy life in the new society; recall past miseries and speak of present happiness; recall past suffering and think over the source of present happiness; recall the past bitterness in contrast to one's present happiness; relate the bitterness of the old society and to savour the sweetness of the new; speak of one's past sufferings and present happy life; tell about one's bitter past and the happy life today

contrast past misery with present happiness; speak of one's past sufferings and present happy life