To practice means that you do something you can do in order to do something that you can't. For example, if I decided I wanted to run a marathon, I would know that despite my best intentions I can't run 42 kilometers but I can run, if I was determined, maybe 1 km.
Human beings bond in a number of ways. We have all manner of instinctual drives inherited from our evolutionary past; we have needs (for intimacy, pleasure, friendship, affirmation and a thousand more besides) which we depend on other people to fulfill. We have hidden parts of ourselves which we project on others so that we can, in relationship with those others, work out our inner conflicts by proxy. We have our inner cravings for power or esteem or security which we imagine that others can satisfy for us.
There is a scene in TheLord of The Rings: The Return of the King in which Peter Jackson improves on Tolkien. At the battle of Pelennor Fields, King Theoden leads the Riders of Rohan to assist in the defense of Gondor. His niece, Eowyn, whom he loves more dearly than a daughter is forbidden, because of her gender, to fight.