In the Contemplation Sutra (观无量寿佛经), the Buddha stated that those who wish to be born in Amitabha Buddha’s Pure Land should cultivate the 3 pure conditions (净业三福), which are also the timeless causes of Buddhahood. They are related to the teaching from the Amitabha Sutra (阿弥陀经) that one cannot be born in Pure Land through minor good roots, blessings, merits and causal connections. (不可以少善根、福德、因缘，得生彼国.)
As such, the 3 pure conditions are needed for extending good roots, increasing blessings and merits, and strengthening causal connections. Along with these conditions, the key method for successful birth in Pure Land relies on single-minded mindfulness of Amitabha Buddha based on having strong faith in him, having strong aspiration to meet him and having strong corresponding practice. With these interconnected causes and conditions [3 provisions: faith, aspiration and practice (三资粮: 信愿行) and 3 pure conditions] in place, reaching Pure Land is further guaranteed.
一福 : 1st Condition
孝养父母 : Caring for our parents with filial piety.
奉事师长 : Serving our teachers and elders with respect.
慈心不杀 : Cultivating compassion by not killing.
修十善业 : Practising the ten wholesome deeds.*
二福 : 2nd Condition
受持三归 : Taking refuge in and upholding the Triple Gem.
具足众戒 : Abiding by the precepts fully.
不犯威仪 : Conducting ourselves in proper and dignified ways.
三福 : 3rd Condition
发菩提心 : Generating Bodhicitta.
深信因果 : Having deep faith in the law of cause and effect (Karma).
读诵大乘 : Studying and reciting Mahayana sutras.
劝进行者 : Encouraging others to advance on the path to Enlightenment.
* Abstention from killing, stealing, sexual misconduct, lying,
tale-bearing, harsh speech, idle talk, greed, anger and wrong views.