Lech Walesa, leader of the recently relegalized Solidarity union, met Thursday with Polish-born Pope John Paul II, a vocal supporter of the union during the years it was banned. Walesa entered the pope's study in the Vatican apartment for the emotional, 30-minute audience and fell to his knees. The pope lifted Walesa to his feet, linked arms with him and led him to journalists waiting in a corridor. Again Walesa dropped to his knees before the pope and again the pontiff raised him gently to his feet. "I wanted you to see how Mr. Walesa greets me and how I welcome him. I greet him with all my heart," the pope said. Walesa attended the audience with his wife Danuta and three members of the union.