Chastity should be practised by lay people too, at least for a limited period.Though one has to struggle against desire whenever it arises, gradually one will learn to avoid thoughts that lead to passion.Then one can enjoy the benefits of non attachment and dispassion. As long as one is still attached to the body, it will not be possible to gain deep concentration and insight.One must purify the mind through meditation, and dispel any sensual thoughts that arise.Attachment and lust will always leak in, if the mind is not carefully protected.