Habits are formed, not at one stroke, but gradually and insensibly; so that, unless vigilant care be employed, a great change may come over the character without our being conscious of any.
Richard WhatelySome persons resemble certain trees, such as the nut, which flowers in February and ripens its fruit in September; or the juniper and the arbutus; which take a whole year or more to perfect their fruit; and others, the cherry, which takes between two an three months.
Richard Whately