Sefer Me’ohr Vashemesh (Parshas Balak) relates that he was once in the presence of the two holy brothers, the Rebbe Rav Elimelech of Lizhensk zy”a and the Rebbe Rav Zushe zy”a when he asked them the following question:
“You are known as great miracle workers. Can you teach me how to do this too?”
Rav Elimelech answered that when tzadikim connect with each other with deep and profound love, they are able to create miracles. Rav Zushe agreed and said, “This is definitely the main thing!”