This movie is a classic for showing how relationships, when open to healing, lead to love. The ego seeks relationships to fill a feeling of lack and thus attempts to find completion in a partner. Thoughts of lack and related feelings are the blocks to the awareness of love.
Harry and Sally are longtime friends who meet from time to time and share their experiences of searching for and failing to find love. As the friendship deepens, a thought arises, can a man and a woman be friends without sex getting in the way? The ego protects the desire to be separate and autonomous through doubt thoughts. The ego might claim a block to maintaining love to be sexuality (e.g. whether to have sex, having too much sex or having too little sex), yet this is just one example of many perceived differences and lack inherent in the ego perspective. These thoughts are an attempt to block recognition of the deep fear of love.
Relationships given over to the Holy Spirit allow the fear of intimacy and true joining to be flushed into awareness for healing. This is the willingness to question whether these thoughts are true and openness to be shown another way. True love dawns as perceived differences are transcended and grievances are all released. As these are cleared the recognition arises that completion cannot be found outside, for love is within. It is possible to share a purpose that leads to the experience of love. The recognition of Love's magnitude fills awareness as littleness and unworthiness are gently and voluntarily laid aside.