Rubuta ci gaba don wannan sakin layi - Wani ɗan takara mai aiki na Majalisar Vatican ta biyu (1962<unk>1965), Liénart ya kasance jagora mai sassaucin ra'ayi a majalisar kuma ya zauna a Kwamitin Shugabancinsa. Sa'ad da Roman Curia, wanda ya ƙunshi firistoci masu ra'ayin mazan jiya, ya ba da jerin sunayen waɗanda za su zama membobin kwamitocin majalisa, Liénart ya yi adawa cewa babu wani abin da aka rubuta game da cancantar waɗanda aka zaɓa. Liénart, wanda Cardinals Bernardus Johannes Alfrink da Giovanni Colombo suka taimaka, ya ba da ɗaya daga cikin saƙonnin rufe majalisar a ranar 8 ga Disamba, 1965. Ya kuma kasance daya daga cikin 'yan takarar cardinals a 1963 papal conclave
, wanda ya zabi Paparoma Paul VI.