Generosity is centered upon selfless motivation. You give up any notion of who is giving, what is being given, and who is receiving. You just give without any attachment or fixation to what happens next.
You're walking down these stairs very early on a foggy morning. You smell the faint scent of men's cologne, and hear footsteps, but, no matter how hard you look, you don't see anyone. You spin around and find you're now face-to-face with the illusive man... What happens?