Walking in the evening is good exercise. Walking in the evening by a river is both a physical exercise and a source of pleasure. For one may get much pleasure to see the river, the rays of the setting sun. The little waves of the river fill the mind with much delight. He is also pleased to see the boats of different sizes plying up and down. In the evening fishermen catch fish. Birds return to their nests. The light of the setting sun gradually becomes gloomy. By enjoying this scenery the mind becomes full of cheer and freshness. Thus an evening walk can be made pleasurable by enjoying the sights and scenes of nature.