In fact Donne is unusual, if not unique, for his era in that courtly love hardly appears in his poetry at all. Courtly love seems to depend on the lover being unsuccessful, whereas Donne rejoices in success at every level. And the courtly love poet always expresses the same experience of love, the range of situations and emotions dealt with being very limited. In contrast Donne expresses an enormously wide range of feelings in his Songs and Sonnets, all relating to the experience of love, but varying from the heights of ecstasy to the depths of despair. This variety of feeling lends Donne's poetry much of its impact, for we seem to be reading an individual's personal experience of love, and not just a poet's contribution to a long-standing tradition of poetic love.