Blessings are contagious, so to speak, and are transmitted in a fashion that is rather like catching a cold. If somebody has a cold and you are too close, you catch a cold too. Likewise, if you get close to a master who has blessings, they can be transmitted to you. Blessings here mean the sense of some power of realization or power of samadhi, some kind of atmosphere of realization that is naturally present. You move close to him, in the sense of opening yourself up through devotion and making sincere, heartfelt supplications. In other words, you lower your defenses, whatever doubts and suspicions that prevent you from being "infected" with blessings. The moment you do that, you catch a cold as well.

Drubwang Tsoknyi Rinpoche in In the Presence of Masters by Reginald A. Ray